Julie is selling candy bars to raise money for new band uniforms. candy bar x sells for $2 and candy bar y sells for $3. julie needs to sell at least three times more y candy bars than x candy bars. she has at most 36 candy bars to sell. which objective function can be used to find the profit p that julie makes from selling the candy bars? a) p = x + y b) p = 36xy c) p = 2x + 3y d) p = 3x + 2y