1. The number of computers sold per day by Dans Computer Work is defined by the following probability distribution:

X 0, 1, 2, 3, 4, 5, 6

P(x) 0.05, 0.10, 0.20, 0.20, 0.20, 0.15, 0.10

A. P(3<= x< 6)=?

B. P(x> 3)=?

C. P(x<= 4)=?

D. P(2< x<= 5)=?