Hello, may I get a step-by-step explanation for each? Thank you!

Two spaceships A and B are exploring a new planet. Relative to this planet, spaceship A has a speed of 0.66:; and spaceship B has a speed of 0.79:. What is the ratio IDA/DB of the values for the planet's diameter that each spaceship measures in a direction that is parallel to its motion? 1| Suppose the straight-line distance between New York and San Francisco is 4.1 x 10 m (neglecting the curvature of the earth). A UFO is flying between these two cities at a speed of 0.55c relative to the earth. What do the voyagers aboard the UFO measure for this distance? Number HI UnitsAs the drawing shows, a carpenter on a space station has constructed a 30.0\" ramp. A rocket moves past the space station with a relative speed of 0.725c in a direction parallel to side 1:. What does a person aboard the rocket measure for the angle of the ramp? Number n Units E]