Use the probability distribution you made in Exercise 20 to find the probability of randomly selecting an employee whose overtime is

(a) One or two hours,

(b) Two hours or less,

(c) Between three and six hours, inclusive,

(d) Between one and three hours, inclusive, 

(e) At most four hours.

Exercise 20

The number of overtime hours worked in one week per employee

Overtime hours 0 1 2 4 5 6 Employees 6 12 29 57 42 30 16