All right. Now, what is this question? The monthly charges for cellphone plants in the United States are normally distributed. This is very important with mean 62 as and a deviation 18. Okay, so let's just try to draw this. The mean is 62 right? The mean is 62 and standard deviation is 18, which means the points of curvature. The inflection points, right? The point where the graph is going to change its curvature will be 18 apart. Right? What are the inflection? Points? They are new, minus sigma and mu plus sigma. Right. So this will mean that this is a new minus 18. Biggest sigma is given to us as 18. Right? So this is mu minus signal, which is 40 full. All right. And this is Mu plus Sigma, which happens to be 80. These are our points of inflection. Now. The first point was draw the normal curve and label the parameters. Obviously, we have already done that. Then she said the reason that represent the proportion between the plan that charge less than $44 less than 44 is this region, right? This is the region that charges less than $44. Okay, this is Barbie. Now suppose the area under the normal cup to the left of 44 is 440.1587 Now, this area, this shaded reason. Just a moment. Okay, This shaded region is point 158 three 1587 Sorry. 15870.1587 Which means 15.87% of the people 15.87% of people of people get built. That is less than $44. Right? These are monthly cellphone rates. Yeah, and one minus 50.1587 This is around, I think. 8413 Let's just check this one minus 0.1587 Yeah, this is 8413 which was an 84.13% of people get a monthly bill of people, get a monthly bill that is greater than dollar 44. And these are the two interpretations that can be made. Yes. This is how we go about doing this question.