hi expert answer please

Compute the flux-integral u . N ds = IM where u is the vector-field u = (2xy + x y, xy + 4x, 627+ 17), . M is the upper half semi-sphere M = {(x, y, =); x? + y' + 2' = 1, > > 0}, and N is the upwards unit normal on M. Determine real numbers a and b so that the integral 1+ 2 -Or -0) dr is as small as possible