How to solve 1 and 2?

Y M227 Elementary Statistics FINAL Exam 1. Compute the probability for the standard normal random variable Z: a) P (/ Z > 1) = Normalcdf (- 9, 1. 1=0.84 1 ( 2 ) = 0.74 b) Find Z-score if area between 1 and Z is 0.1 invnorm (0: 74 ) = 0. 6433 c) Find Z-score if area between - Z and Z is 0.90 +20 normalcdf 10. 64 3 3 , 0.1 ) = - 20 2. An old cannon hits the target with the probability p =0.25. How many shots are required to hit the target with the probability p=0.95