14. For each of the following functions find a minimum SOP expression, using algebraic manipulations 4 pts) b) f-A' + ABC + A (B C) + AB,C, Using the boolean theorems and identities covered in lectures reduce the following expressions to a minimum SOP form (show each step): (6 pts) 15. a) F (A+BC' + CD) (B' + EF) b) f:xy'ztXy'z +xyz c) F(x,y,z)- (1, 3, 6, 7)