Let S be the surface defined by $\displaystyle z= f(x,y) = 1 - y - x^2$

Let V be the volume of the 3-D region in the first octant bounded by S and the coordinate planes.

Setup the iterated integrals for V in two ways:

a) integrate first respect to x and then respect to y

b) integrate first respect to y and then respect to x

I dont know how to do this problem. I am completely lost.

Thank you