Problem 3 (+20pts). Given a normal distribution with a = 30 and a = 9, nd (using the tables on the formula sheet) (a) the normal curve area to the right of a: = 15; b) the normal curve area to the left of a: = 23; c) the normal curve area between a: = 36 and 3: = 40; d) the value of :13 that has 70% of the normal curve area to the left; e) the two values of a: that contain the middle 65% of the normal curve area. ( ( ( (