2.b Derive the Pre-COVID demand curve for opioids Assume that supply and demand can be represented by straight lines. Suppose that before COVID, the equilibrium quantity of opioids bought and sold per week is 210 points, the equilibrium price is $20 per point, and the price elasticity of demands is -0.8 (so for every 1% increase in the price of opioids, quantity demanded falls by 0.8%). Use this information to derive the pre-COVID demand curve for opioids. Show your work. Pre-COVID Demand Function: Q = Pre-COVID Inverse Demand Function: P = (The inverse function is in 'graphing form': recall that supply & demand diagrams have price on the vertical access. Calculating this here will be useful later on.) Hint: As the Besanko & Bravetigam text linked in the footnote correctly points out, you can derive the demand function in the form Q = a - bP, where a = (1- g)Q* and b = -80*/p*. Here, p* = equilibrium price, Q* = equilibrium quantity, and = = price elasticity of demand. [Show your work]