Given a normal distribution with p = 30 and a — 6, find

(a) The normal-curve area to the right of x = 17;

(b) The normal-curve area to the left of x = 22;

(c) The normal-curve area between x = 32 and x = 41;

(d) The value of a: that has 80% of the normal-curve area to the left;

(e) The two values of x that contain the middle 75% of the normal-curve area.