Find at least five solutions for the equation: x - y = 2 a (4,2), (3,6), (1,5), (2,3), (10,8)
b (1,2), (3,6), (1,5), (2,3), (10,8)
c (1, 2), (2,6), (3,5), (4,3), (5,8)
d (4,2), (8,6), (7,5), (5,3), (10,8)

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.