Stuck on this one...

The perimeter of a parallelogram is 44cm and the length of the shorter diagonal is 14cm. Find the lengths of the sides, given that they contain an angle of 60 degrees.

And this...

THe angles of elevation of the top of a tower from the top of a building 100m high are 50 and 75 respectively. FInd the height of the tower.

I drew diagrams but it still wont work out!