please, can you explain step by step

You are an engineer designing a fuel tank for petrochemical refinery. You will be using a stick to measure the fuel volume in the tank. The height of the stick will define the volume of the fuel. The formulas are given below. For volume of 100 gallon and 300 gallon, calculate the height you will get. Length of the tank (L) is 12 feet and radius is 3 feet. If the total volume 500 gallon and you need to report if tank is 90% full for safety cautions, what would be the height of the stick? Plot volume of the fuel vs height. V SPIT ah (3R-h) 3 Vc = R' cos [(9)J ce- R-h R -(R-h) 2 Rh-h. ] V VCYL + VSPH SHTAM