According to the Hawail Wildlife Fund, North Pacific Humpback Whales migrate from the icy waters around Alaska during the fall to spend the winter in Hawaii where they mate, give birth, and nurture their calves. If they swim about 6,000 miles at a rate of 4.5 miles per hour, then approximately how long does this take: a. in hours? (report your answer rounded to the nearest whole hour) b. in weeks? (report your answer rounded to the nearest whole week)