Idon't know what the teacher is asking. this is all we
(-)

part a is a horizontal cross section that makes a square.

part b is a vertical cross section that creates a rectangle.

step-by-step explanation:

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0