Problem 2: Suppose there is an astronaut who is traveling at a significant fraction of the speed of light. Randomized Variables d=431y v=0.86444 c Part (a) How long, in years, does it take her to travel 4.3 ly at (.86444c (as measured by the Earth-bound observer)? Numeric : A numeric value is expected and not an expression. At = Part (b) How long does it take according to the astronaut in years? Numeric : A numeric value is expected and not an expression. A to =