HI! I'd really appreciate the help on this.. Thanks in advance.

In order to answer the questions below you will need the speed of light: c = 299 792.458 km/s. Use proper unit conversion if necessary and answer with the correct number of significant digits. The questions can be solved using the speed – distance – time relation.

For the questions below, provide a complete solution with explanation.

1. How long does it take light to travel from
a. the Moon to the Earth? (Data: Earth-Moon distance = 384,000 km)
b. the Sun to the Earth? (Data: Earth-Sun distance = 149,600,000 km)

2. Suppose you wanted to reach Alpha Centauri in 100 years.
How fast would you have to go in km/hr? (Data: Sun-Alpha Centauri distance = 4.37 light years)