I need help with these question from Econ. I decided to take on an extra practice worksheet to study but I'm stuck. Please solve and explain the questions below. Everything is given in the attachments, thanks!!

Name : Date: Penrod :. 1: Demand curve shift for increased income. 2. Demand curve shift for population decrease. 3. Demand curve shift for decrease income. `4. Demand curve shift for increased population.5. Demand curve shift for inferior good if income increases. 6. Demand curve shift for inferior good if income decreases. 7. Demand curve shift after new advanced substitute is introduced to the market. 8. Demand curve shift after new advanced substitute is found to cause accidental fires