Problem 4: Suppose a spaceship heading straight towards the Earth at (.75c can shoot a canister at (.35 relative to the ship. Randomized Variables vi=0.75 vo=0.35 Part (a) If the canister is shot directly at Earth, what is the ratio of its velocity, as measured on Earth, to the speed of light? Numeric : A numeric value is expected and not an expression. ple = Part (b) What about if it is shot directly away from the Earth (again, relative to c)? Numeric : A numeric value is expected and not an expression. ple=