Suppose that a demand function is linear, that is, q = m - np for 0 lessthanorequalto m/n where m and n are positive constants. Show that E = 1 at the midpoint of the demand curve on the interval 0 lessthanorequalto p lessthanorequalto m/n, that is, at p = m/(2n). Select the correct formula for Elasticity E. E= -p + dq/dp E=- q/p + + dq/dp E=-p/q + + dq/dp E=p/q + + dq/dp Take the derivative of q in terms of p for q = m - np. Use q = m - np, p = m/(2n), and the value for dq/dp to rewrite the formula for dq/dp in terms of n and m only. E = -p/q + dq/dp Simplify the expression in the previous step.