8. [1/2 Points] | DETAILS || MY NOTES | LARAPCALC10 5.5.046. Find the consumer and producer surpluses by using the demand and supply functions, where p is the price (in dollars) and x is the number of units {in millions). Demand Function Supply Function p =610 21x p = 40x consumer surplus % {4000 X producer surplus $ (2000 v Need Help? 9. [-/1 Points] | DETAILS || MY NOTES LARAPCALC106.1.070. Find the present value of the income (in dollars) over t, years at the given annual inflation rate r. (Round your answer to two decimal places.) c = 28,000 + 200t, r = 6%, t] = 6 years sl Need Help? Submit Answer 10. [-/1 Points] DETAILS MY NOTES LARAPCALC106.1.072. Find the present value of the income (in dollars) over t, years at the given annual inflation rate r. (Round your answer to two decimal places.) c = 5000 + 23tet/10, = 5o, , = 10 years sl Need Help? Submit Answer 11. [-/1 Points] DETAILS MY NOTES LARAPCALC10 6.1.068.MI. Find the present value of the income (in dollars) over t, years at the given annual inflation rate r. (Round your answer to two decimal places.) c = 350, r = 4%, tl = 8 years sl ]