PLEASE HELP ME PLZ I WILL MARK AS BRAINLIEST

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Ill mark the brainliest if you me with the these three questions 7,8,9

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2