can someone show me how to solve: suppose the own price elasticity of demand for good X is -3, its income elasticity is 1 its advertising elasticity is 2, and the cross price elasticity of demand between it and good Y is -4, determine how much the consumption of this good will change if the price of good X decrease by 5 percent, the price of good Y increase by 8 percent, advertising decrease by 4 percent and income increase by 4 percent.