So we are given the data that Q one plus Que Tu is equal to 20 my local room. So let's write and write that down for part A. We are given that force is 0.75 mutants. Let's substitute it in terms off electrostatic force off attraction or repulsion, which is when divided by four pipes that are not here. Times Q. One Q two Divided by our square, which is equal to 0.75 Now distance are is three. So three square is nine, which is here, and this is one by four pipes that are not so In this way. You find the product Cuban que tu as 75 times 10 power negative 12. Let's simplify that. If you simplify that you get, he want you to product at 75 Micro cool. I'm square by simply for that. I mean, just write 10 power negative 12 as micro Coolum Square so that our calculations will be easier since we are given that Cuban place cute who is 20 micro column here. We can use this equation to write cute, too, in terms of Cuban, as we have done here, 20 minus Cuban and substitute this in this equation appear. So if you do that, it's 20 to 1 square 20 Q one minus Q. One square. Is it well to 75? This is a quadratic equation. Q E. Okay, so let's write it down in a standard form human square minus 21 plus 75 now on a side. Note. If you have If you are given a quadratic equation as X squared plus B effortless, see the Solution X is equal to negative B plus minus square root B squared, minus full, A C divided by twice a day. So let's use that here. So Q one is equal to positive 20 because of this negative sign here. And this negative sign here makes it positive plus minus square old 400 minus 400 of the square of 20. So here, which is be square square on dhe for a sea. Since value off A is one here it is four times 75. Now, if you solve it four times 400 minus. This is 300 makes it 100 square root off under the strain, so 20 plus 10 is 30 or 20 minus 10 is 10. So you get Cuban is either 15 micro Coolum or find my curriculum as shown here and see that both values are complimentary. How do we say that is because if Cuban is 15 micro Coolum Que tu is fine, My curriculum and if you want is fine. Michael Coolum Que Tu is 15 micro Coolum so that their addition is 20 now in the part B were given their forces 1525 Newton, but with additional condition that the charge attract each other. That means the falls off its force off attraction, which must be negative. So that will give us the product. If you want you to as negative 5 25 Cuban square on a similar lines now to solve it, we will do the same things that would date for the party, eh? So we will get same quadratic equation, except for the factor off negative 5 25 here, which was positive 75 before Now it's negative. 25. Even the factor of 20 won't change because edition of Q and Q two is still 20. So if you saw this quadratic equation here, you get the solution here, which is 20 plus square root of 2500 which is either 70 by two or 30 by two. In this case, this will be negative. Implies Q one is either 35 micro Coolum. Oh, or negative 15 micro cooler as before, both by loser complimentary. That is, if Kyu won is 35 Micro Colon, you too. We'll have to be negative. 15 micro puller. And if Cuban is negative 15 miles of blue ink you two will have to be 35 Marco Polo. Thank you for listening.