The questions has been answered several times before but I am having difficulty to understand them so please explain every single step in detail and write everything clearly!

Using rules of inference and logic equivalences describe each step of this argument (e.g., using Modus Tollens with step 1 and step 2 we derive...)

Premises : (tVq) (PA-r), (u V-8) +t,(PA-r) +9,78 V tVq, -t Au,p V-q. Conclusion :P Steps Reason/Law/Rule Applied? 1)-t Au 2-t 3)(UV-s) + 4)-t +-(UV-8) 5)-t + (- us) 6- us 7) 8 8)(t Va) (PA-r) 95 Vtva 10) s tva) 11)s (PAT) 12) par 13) (P A r) 14). 15 p V 16P