Consider the following covering matrix M, where the 12 columns (prime implicants) are to cover the 8 rows (minterms). The cost for each column is given in the bottom row. (a) Identify all cases of row and column dominance in M by filling in the following table with the appropriate row and column names: (b) Using any method, find a minimum-cost covering set S for M. (c) How many minimum-cost covers exist? Please list them all