11. A survey indicates that the function S(e) = 340e2 - 4360e + 4500 indicates the relationship between the years of experience, e , that a worker has and annual salary, S, in dollars of employees in a company a) Determine the rate of change of salary with respect to education for the value of e i. 10 ii. 12 iii. 16 iv. 18 b) Refer to your answer in part a). What do you conclude? c) At what level of education does the rate of change of salary equals $5000 per year of education. 12. A store sells 140 stainless steel thermal travel mugs per month at 24 dollars each. A survey indicates that for each $1.50 decrease in price sales will increase by 5 travel mugs. a) Determine the demand function. b) Determine the revenue function c) Determine the marginal revenue d) Solve for R(x)=0. What does it mean? How can the store use this information? e) What price corresponds to value found in part d)