Energy to accelerate a spaceship to relativistic speed how

Question

Solve the given problem:

Problem: Energy to Accelerate a Spaceship to Relativistic Speed:

Part 1: How much energy is required to accelerate a spaceship with a rest mass of 116 metric tons to a speed of 0.446c?

Part 2: Every day our Earth receives 1.55 x 10²² J energy from the Sun. If we were able to use 0.85 percent of this energy to accelerate spaceships, then how many missions would be possible in one year?

Please show all work so I can fully understand all concepts!