Some parts of this exam are skipped and I need step by step explanation after the 1st line. And confirmation if result is really correct? It's from the workbook of some student and our professor gave it to us for practice and I keep getting some other number. So I wanted to check it with THE BEST OF THE BEST. I will upload a screenshot on my profile on this site https://imgbb.com/.
Thanks to anyone in advance!
I posted the image here because I don't have enoguh points :