Let X be the amount of time (in hours) the wait is to get a table at a restaurant. Suppose the cdf is represented by,

F(x) = { 0, x < 0
{ x³/216, 0 < x < 6
{ 1, x > 6

Use the cdf to determine Var(X) = σχ.

a. 1.35
b. 1.1619
c. 17.1
d. 4.1352
e. 3.1619