Logic Circuits, sum of product, product of sums.

Having some trouble with logic circuits. I was able to get all but these two on my homework and I am unsure how to do them.

Simplify the following expression in (1) sum of products and (2) products of sums:

b) F = (A+B+D)(A+B+C)(A+B+D)(B+C+D)

Simplify the following Boolean functions

F = AC' + B'D + A'CD + ABCD

a) And draw the simplified function using AND, OR, Inverter

b) Only NAND, inverter gates

c) Only NOR, inverter gates