Given that , f(a,b,c,d,e) = Σm (6,7,9,11,12,13,16,17,18,20,21,23,25,28) using a Karnaugh map.
(i) Find the essential prime implicants
(ii) Find the minimum sum of products
(iii) Find all of the prime implicants
(b) Use the tabular method to find a minimum cost SOP realization for the function
F(x1..,x4)= Σm(0,4,6,8,9,15 )+D(3,7,11,13)