- F1*F2 = PRD M(0,3,5,6)
- F1*F2 = SUM m(1,3,5,7)
- F1*F2 = SUM m(0,3,5,6)
- F1*F2 = PRD M(1,2,4,7)
- F1*F2 = PRD M(2,4,6,7)

1 is CORRECT. F1 may be expressed as F1 = PRD M(0,3,5) therefore

F1 * F2 = PRD M(0,3,5) * PRD M(3,5,6) = M0*M3*M5*M3*M5*M6 = M0*M3*M5*M6 (recall: x*x = x) = PRD M(0,3,5,6)