Boolean algebra: Minimizing a product of sums expression?

Question

For the life of me, I can't figure out how to get this into minimal product of sums form. Any help is appreciated.

(a+b+c)(a+b'+c)(a+b'+c')(a'+b'+c')

Answer 1

This product-of-maxterms expression can be reduced to the following sum of minterms

!bc or a!c

             ab
       00  01  11  10
      +---+---+---+---+
   0  | 0 | 0 | 1 | 1 |
c     +---+---+---+---+
   1  | 1 | 0 | 0 | 1 |
      +---+---+---+---+