The price of a fish dinner is $4. When Harry's old income was $1,500 per month, his old monthly demand for fish dinners was Q = 18 - 0.5P. When Harry got a pay raise and began to earn a new income of $2,000 per month, his demand shifted to a new function of Q = 21 - 0.5P. Given this information, find Harry's income elasticity (E_I) for fish dinners. Harry's income elasticity is for fish dinner is _____________.

Consider your answer to the previous question. Based on the income elasticity you found, we can conclude that for Harry, fish dinner is considered _________________.

Group of answer choices

a normal good, and a luxury

a normal good, and a necessity

an inferior good