HELP PLEASE HELP ME

4) The company Tahoe Gear is trying to test a a cone shaped tent.
The tent has a diameter of 18 feet and a height of 12 feet.
Part A) An average person's volume is about 2.3 cubic feet.
If you squeezed as many people as possible into this tent, how many people could you fit?
Part B) Tahoe Gear is trying to figure out the amount of material they need to make the tent.
What is the surface area of the tent ?
Part C) Tahoe Gear wants to include a free camping rug to put on the floor of the tent. What is the area of the biggest rug that could fit to put on the floor of this tent?