Thank you once again earboth, with your help I was able to understand the question. Hopefully I have answered them correctly (although you have already confirmed b)

a) Initially Q is @ 3.2 m after P rotates 90 degress using the pythagoras theorem we find

Distance the end Q travelled = 3.2 m - 2.38 m = 0.82 m

b) Distance the end Q travelled (half a turn) 2 x .75 = 1.5 m

c) using the sine rule we find sin(30) c = 3.12 m

using the sine rule again we find sin(170) c =1.76 m

Distance the end Q travelled 1.36 m

If I have made any mistakes please let me know. Thank you.