Following the diagram, there is a theorem that states:
AX * BX = DX * EX
You can use that to solve for x.
\((x+10)(x+1)=x(x+13)\\ x^2+11x+10=x^2+13x\\ 2x=10\\ x=5\)
I am not going to answer 5 and 9, but just tell you how to do it.
You use that formula to solve for x and find pq. Good luck!
I hope this helped,