Calculus 3 homework about double integrals over rectangles that

I need help. Thanks.

1 . Estimate the integralRIN + 1Where R – ( ( ) – Is read sys 1 using a doubleHanna Him Subdivide A into I regions of equal size and use the upper-left corner of eachregion as your simple point. Estimate the average value of an It over the rectangle R = 1 4 x 1 1 by exposing it in forINTHEof an integral and then approxhunting that Integral with a double Mcmann stan , Subdivide Rlife I regions of rental wier and like the midpoint of rush region in your sample point .