I have a few questions on a problem in my first Calc III class. "The solid cube in the first octant bounded by the coordinate planes and x=2,y=2 and z=2, write the inequality to describe the set". I am new to the 3 dimensional cartesian system, but i still do not get the concept of the octants because i figured their would be 12, 4 for each plane. and also, x^2 + Y^2 <=1 and no restriction on Z, how does this graph look like. I have been having trouble with those 2 problems. I would greatly apreciate your help.