I need help please, it’s due in 10 minutes

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

At which value in the domain does f(x) =0?