(Combinational Logic Design) Consider a 4-input Boolean function that is asserted whenever exactly two of its inputs are asserted.
(a) Construct its truth table.
(b) What is the function in sum-of-products form, using "little m" notation?
(c) What is the function in product-of-sums form, using "big M" notation?
(d) Use the Karnaugh map method to simplify the function in sum of products form.