A left-hand cable has a tension T1 and makes an angle of 49 with the horizontal. The right-hand cable has a tension T3 and makes an angle of 51 with the horizontal. A weight M1 is on the left and a weight M2 is on the right. A cable connecting the two weights has a tension 32N and is horizontal. The acceleration due to gravity is 9.8 m/s^2. What is the mass of M2 in kg? I have no clue where to even start. Help please!