Let X be a normal random variable with a mean of 0.?4 and a standard deviation of 4.99. a) Calculate the corresponding zscore (z) for the point x = 5.0. Give your answer to 2 decimal places. b) The area under the standard normal probability densityr function from negative infinity:r to z is interpreted as the probability that X is: 0 less than or equal to 5.0 0 equal to 5.0 O greater than or equal to 5.0