Assume that the price elasticity of demand is -0.75 for a certain firm's product. If the firm lowers price, the firm's managers can expect total revenue to O Increase O Decrease O Remain constant O Not enough information to answer this question. Question 15 1 pts Total revenue is maximized when O demand is unitary elastic and marginal revenue is positive O demand is unitary elastic and marginal revenue is zero O demand is inelastic and marginal revenue is negative O demand is elastic and marginal revenue is positive