4. Using only the - and the A operators, find a logical expression that is equivalent to q(-p Vr). For this question, you do not need to specify "how" you found the equivalent expression because you will show both techniques in questions 5 (0.5 marks) and 6 below Prove that the expression you found for question 4 above is equivalent to the expression q(-pVr) by using only truth tables. Show all your work and do not skip any steps (i.e., ensure you that you include a new column for every single (4.0 marks) 5. operation). 6. Prove that the expression you found for question 4 above is equivalent to the expression q(pV) by using only the logical equivalences. Show all your (4.0 marks) work and do not skip any steps