a) Find the area under the standard normal curve to the right of z = -1.42. b) Determine the area under the standard normal curve that lies between z = -0.8 and z = 0.8 c) Find the area under the standard normal curve between z = 1 and z = 2. d) Assume that the random variable X is normally distributed, with mean =40 and standard deviation =10 Compute the probability P(12 X 55). 19a.___________ 19b.___________ 19c.___________ 19d.___________