Could someone PLEASE help me with these physics questions?

(3) n A huge (essentially innite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. The upper face carries 9571677712 while the lower face carries 25 710/7112. What is the magnitude of the electric eld at a point within the sheet 2.00 cm below the upper face? (4) 1') A small circular loop of wire with radius r = 1 cm is placed at the center of a large circular loop of wire with radius R 2 10cm. The two loops lie in the same plane, and 1'"