How do I solve for this question?

3. A spaceship is built in the shape of a rectangle, 100 m long and 10 m wide HMS Henri and deep. V 100 m Spaceship Henri flies by the Earth at a velocity of (3/5)c to the right as shown. (a) What dimensions does Henri appear to have to someone on Earth? (c) At t = 0 (in both frames), the spaceship passes by the Earth, which we will take to be x = 0. One second later (in the spaceship's frame) the ship flashes a light. At what time and position does the flash appear from Earth