1. Estimate J f (x, y) dA using the table of values below, where R is the rectangle 0

1. 2. Estimate J R f (x, y)dA using the table of values below, where R is the rectangle 0 x 4, 18 15 12 Let R be the rectangle with vertices (0, 0), (2, 0), (2, 4), and (0,4) and let f (x, y) = XM15. a) Find a reasonable upper bound for fdA without subdividing R. b) Estimate f R fdA by partitioning R into four sub-rectangles and evaluating f at its maximum value on each subrectangle.