I need help with 1 and 2 please. Thank you!

1. In the system below my is being held 2.0 m off the ground and the system is initially at rest, find the velocity of the system when ma impacts the floor using energy considerations only. Assume no friction in this problem. Ans. VF = 4.83 m/s m1 = 1.0 kg m2 = 2.0 kg 0= 40.0 m3 = 6.0 kg m2 ma m1 40.00 2. A person stands at a height, h above the ground on a cliff edge. They decide to swing on a 30.0-m long vine initially inclined at an angle of 37.0 with the vertical. a) What is their speed at the bottom of the swing (a) if he starts from rest? b) What is their speed at the bottom of the swing if he pushes off with a speed of 4.00 m/s? Ans. a) 10.8 m/s b) 11.6 m/s