I'm currently learning supply and demand and their shifts. Can someone explain how to solve for these problems? I'm not sure where the demand/supply would shift in these problems and don't really quite grasp the open ended response questions.

1. Fill in the blanks: a. A decrease in demand leads to a in the demand curve to the and causes price to go and quantity to go b. A decrease in supply leads to in the supply curve to the and causes price to go and quantity to go c. An increase in demand leads to a in the demand curve to the and causes price to go and quantity to go d. An increase in supply leads to a in the supply curve to the and causes price to go and quantity to go 1. What is one of the major goals of economic analysis? 2. When there are \"double shifts\" of supply and demand going in opposite directions, what is bound to happen