1. If the utility function is the perfect complement preference, then (1) If the consumer is a borrower, and the interest rate decreases, please draw the budget constraints and Intertemporal consumption bundles. (2) If the consumer is a saver, and the interest rate decreases, please draw the budget constraints and Intertemporal consumption bundles (3) If the utility function is perfect-substitute preference, please do the (1) and (2) again. 2. Please draw the Hicks substitution effect (1) If the utility function is Perfect complements preferences (2) If the utility function is Perfect substitute preferences (3) If the utility function is Quasi-linear preferences