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Both the fan and light in the hood should have a black wire. Attach both of them to the black wire protruding from the wall by twisting the exposed ends together.  Cover the exposed ends with a wire nut. If there is not enough exposed wire, strip the sheathing off the ends with a pair of wire strippers. Repeat the process in step one with the white wires from the fan, light, and wall. Your home's ground wire should be green or exposed copper. Attach it to the green grounding screw and tighten the screw with a screwdriver.
Attach the black wires. Attach the white wires. Attach the ground wire.