Suppose the monthly charges for cell phone plans are normally distributed with mean u = $70 and standard deviation o = $17. (a) Draw a normal curve with the parameters labeled. (b) Shade the region that represents the proportion of plans that charge less than $53. (c) Suppose the area under the normal curve to the left of X = $53 is 0.1587. Provide an interpretation of this result. (a) Choose the correct graph below. O A. OB. O C. OD. X X X 53 87 36 53 70 36 70 104 70 87 104 (b) Choose the correct graph below. O A. O B. O C. OD. 53 53 X X 36 70 104 70 87 104 53 70 87 36 53 70 (c) Select the correct choice below and fill in the answer box to complete your choice. (Type a whole number.) O A. The probability is 0.1587 that a randomly selected cell phone plan in this population is less than $ per month. O B. The probability is 0. 1587 that a randomly selected cell phone plan in this population is more than $ per month