I need help with this 3 questions, please

11.) When 12.) When you sell NDSU Bison jerseys at $50 each, you can expect to sell 1500 this semester. If you increase the price by $5, you will sell 130 less jerseys. Given this information, find a Hnear demand function that relates the number of jerseys you can sell and their unit price. Use this model to then find a revenue function, and find the optimal price that maximizes revenue. Round and label appropriately. What is the maximum revenue you can earn this semester? 13.) A college math instructor has found that the linear model G(q) = 20+0.82g accurately predicts what grade a student will eventually earn in her class G, given how that student performs on an assessment quiz given at the beginning of the semester (0 5 q