Can anyone confirm if this answer is right ?

The depreciation per unit for a company

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

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.