The number x of bicycle helmets a retail chain is willing to sell per week at a price of $p is given by x=78√√p+16-400, 20≤ p ≤ 100. Complete parts (A) and (B). (A) Find Supply/Demand 800- 700- x X=1000-62p+16 600- 500- 400- 300- dp dx dp (B) Find the supply and the instantaneous rate of change of supply with respect to price when the price is $84. Interpret your results. When the price is $84, the supply is When the price is $84, the instantaneous rate of change of supply with respect to price is At a price of $84, the supply is at a rate of bicycle helmets per week and supply bicycle helmets per dollar. 200- 100- x=78-p-16-400 P is 20 40 60 80 100 120 Price (Dollars)