15) Construct a combinatorial circuit using inverters, OR gatios, and AND guter that produce the output ((pqr)(pqr)) from input bits p and q.[2ps] a) b) c) d) None of them P4=Pq 16) Use De Morgan's laws to find the negation of the statemeat: "The shidont will Aave a class tomorrow or will have an exam. "[1pt] a) The student will have a class tomorrow and will hrve an exam. b) The student will have a class tomorrow and will not have an exam