1.79 Find some proportions. Using either software or Table A, find the proportion of observations from a standard Normal distribution that satisfies each of the following statements. In each case, sketch a standard Normal curve and shade the area under the curve that is the answer to the question.

a. Z > 1.85

b. Z < 1.85

c. Z > −0.90

d. −0.90 < Z <1.85