Difficult M2 Question, Help needed

You can put the final answer but you asked us to explain the solution which isn't allowed.

I also got the right answer when I resolved horizontally - did you check the answer was not what I posted above?

In the part you quoted I was talking about using the T=root 5 W given in the question.

When I said that was a misprint I did so by using the result T=W/root 5 which is the same as T= root5 W/ 5. So I don't know what you want me to check. I worked it out once using the info given in the question and got nonsense and once using the info we found out and got the right answer.

I want you to check the answer in the book is not T = (Wroot5)/5 ie did you misread it.

The answers to the second part are correct and I've checked them.