A six-variable function is given by its list of minterms f(a,b,c,d,e,f) = m(0,4,6,8,9,11,12,13,15,16,20,22,24,25,27,28,29,31,32,34,36,38,40,41,42,43,45,47,48,49,54,56,57,59,61,6 3) Select correct minimal SOP expressions for this function from the list below f(a,b,c,d,e) = abd'e'+cf+c'def'+a'e'f'+ab'd'f'+ab'c'f' f(a,b,c,d,e) = abd'e'+cf+c'def'+a'e'f'+ab'd'f'+b'c'e'f' f(a,b,c,d,e) = = abd'e'+cf+c'def'+a'e'f'+ab'd'f'+b'c'df f(a,b,c,d,e) = abd'e'+cf+c'def'+a'e'f'+ab'c'f'+ab'cd' all of the above