PLZ help me I will give you the brainlest

1. Find the volume of a cylinder with a radius of 7 inches and a height of 15 inches.

2. Find the volume of a cylinder with a radius of 8inches and a height of 20 inches

3. Find the volume of a cylinder with a diameter of 10 inches and a height of 14 inches.

4.Find the volume of a cylinder with a diameter of 30 inches and a height of 50 inches.