My new vent fan (heat, light, and fan) in the bathroom includes two (2) white wires, a black, a green, a blue, and a red. However, the old vent I'm replacing had five white cables ( a ground, a black and white ) connected to it. Three of the white cables come from the switches in the bathroom. Two of the white cables come from the electrical source. Any suggestions on how I should wire these all together? See image.