Two tug boats are towing a large boat, of mass M kg, back to shore. Tug boat 1 is pulling with a force of T1 N at an angle of 25 degrees north of the forward motion and tug boat 2 is pulling with a force of T2 N at an angle of 25 degrees south of the forward motion. If the large boat is being pulled with constant velocity, and there is a resistive force of 4000N to the motion, then what are the magnitudes of the two forces T1 and T2?