Use Huff's law to compute the probability of consumers' traveling from their homes to each of three

Question:

Use Huff's law to compute the probability of consumers' traveling from their homes to each of three shopping areas: square footage of selling space-Location 1, 15,000; Location 2, 20,000; Location 3, 25,000; travel time-to Location 1, 15 minutes; to Location 2, 21 minutes; to Location 3, 25 minutes; effect of travel time on shopping trip-2. Explain your answer.