Please do not use CHEGG Study. Also, please let me know which book(s) these problems might be from:

Evaluate the following surface integrals. 1. JUs VzdS where S is the surface of the sphere x- + y' + 2 = 4 above z = 1. 2. SIs(azz + y?=)dS where S is the portion of the plane 2 = 4 + a + y inside the cylinder x2 + y? = 4. 3. f(x, y, 2) = x - y where S is given by = = =y' for 0