A cone with a radius of 9 units and a slant length of 15 units is shown. Which statements are true? Check all that apply.

a. The radius of the cone is 9 units.

b. The height of the cone is 15 units.

c. The height of the cone is 12 units.

d. The volume of the cone is represented by the expression 1/3π(15)²(9).

e. The volume of the cone is represented by the expression 1/3π(9)²(12).