1. Fine the probability of a- P(Z> 1.5) b- P( -1.34

1. Fine the probability of a- 1.5) b-P( -1.34 < z < 2.54) 2. IfX is N(12, 6), find (b) P(7SXs19.5) 3. It is known that the waiting times (in minutes) of customers waiting to be served in a restaurant has a mean of 12 and a variance of 16. Find the probability of customers who wait until to be served. (a) for more than 8 minutes, (b) for less than 14 minutes, (c) between 9 and 15 minutes.