Find the volume of the region R = [0,1]x[0x1] and below the plane that passes through the three points (0,0,1), (1,0,2), and (0,1,7).

Let R = [0, 1] x [0, 1]. Find the volume of the region above R and below the plane which passes through the three points (0, 0, 1), (1, 0, 2) and (0, 1, 7)