4 3x 3) A) Good x is normal for all income levels B) Good x is normal for some income levels but turns inferior for higher income levels C) Good x is inferior for all income levels D) Good x is a substitute for income The above equation is an Engel curve equation for Good x. What is true about Good x? 4) U = x0.7y0.3 5x+6y 100 a) (4 points) draw the budget constraint. Be sure to calculate the values of the x-intercept, y-intercep and slope. b) (8 points) calculate the consumer's optimal bundle c) (1 point) add an indifference curve and the optimal bundle to your budget constraint graph d) (1 point) calculate the utility at the optimal bundle