the price of a redbull changes from $4 to $5 initially ari consumes 14 cups of redbull per week and now consumes 18 cups of redbull per week indicate weather the change is negative or positive and keep 2 decimals. 1.what is the percentage change in price 2.what is the percentage change in quanity 3. what is the price elasticity of demand 4 is this example redbull is an elastic, inelastic or unitary elastic good