need help on these two questions

Evaluate the given integral by changing to polar coordinates. Rsin(x2+y2)dA, where R is the region in the first quadrant between the circles with center the origin and radii 1 and 4 Evaluate the given integral by changing to polar coordinates. 0ex2y2dA, where D is the region bounded by the semicircle x=25y2 and the y-axis