. let z be a standard normal random variable and obtain each of the following probabilities, drawing pictures wherever appropriate. (a) p(0 z 2.17) (b) p(0 z 1) (c) p(2.50 z 0) (d) p(2.50 z 2.50) (e) p(z 1.37) (f) p(1.75 z) (g) p(1.50 z 2.00) (h) p(1.37 z 2.50) (i) p(1.50 z) (j) p(|z| 2.50)