please solve everything

4. Show that each of these conditional statements is a tautology. Please show each step and the laws you use. Example: (pq)p 2 of 3 (pq)p(pq)p(pp)qTqT[Identityofimplies][DeMorganslaw][Associativelaw][Negationlaw][Dominationlaw] a. p(pq) b. (pq)(pq) 5. Show that (p(pq))pq. Please show each step and the laws you use. 6. Show that (pq)(pq)p. Please show each step and the laws you use