[" 15.yery ugatizy "(1)/(4)x^(2)=4y,y=2,y=4" ran "y-388y#" for "8sqrt(x)" and "(1)/(21)x^(2)+4x+1],[" [Find the area of the region bounded by "x^(2)=4y,y=2,y=4" and "y" -axis in "],[" the first quadrant."]]