Indicate whether the following statements are true​ (T) or false​ (F). nothing​: When the marginal revenue is​ positive, demand is elastic. nothing​: If the firm raises the price in the elastic range of​ demand, total revenue will increase. nothing​: When demand is unit​ elastic, marginal revenue​ = 1. nothing​: When the total revenue is​ increasing, demand is elastic. nothing​: The absolute value of the price elasticity of demand increases as you move down the demand curve.