Suppose X is a normal random variable with mean pm: 56 and Standard deviation 6: 12~ (a) Compute the zvalue corresponding to X = 42. ' ,7 i V (b) Suppose the area under the standard normal curve to the left of the z-value tound ln part (3)15 0.1217. What is the area under the normal 5 curve to the left of X = 42'? _ ' (c) What is the area under the normal curve to the right of X = 42