Assume that there are three shopping locations with 500, 1000, and 3000 square feet of space allocated to outdoor lighting fixtures. A group of potential customers at Waterfall housing estate lives 5 minutes from the first location, 10 minutes from the second location, and 15 minutes from the third location. The retailer estimates the effect of travel time to be 2. Using Huff's Gravity Model, calculate the probability of cutomers shopping at:
a) Location 1
b) Location 2