Elijah bought a $25$-pound bag of dog food. He feeds his dog $0.5$ of a pound of dog food each day. Elijah will buy another bag of dog food when there are $2$ pounds of food left over. Part A Use the drop-down menus below to create an equation that represents the situation, in which $d$ represents the number of days until Elijah buys another bag of dog food. $=$ Question 2 Part B How many days can he use the $25$-pound bag of dog food before he buys a new bag? Respond in the space provided. If your test is on paper, write your answer on the answer sheet.