5. A) Discuss the three basic demand forecasting models (3 marks). B) Many companies rely on time-series forecasting, but COVID-19 has caused the demand for some products to fall sharply (e.g. spare parts for aircrafts, air travel, theatre visits), the demand for some products to rise sharply (e.g. in-home consumables, face masks, vitamins) and the demand for other products to have temporary spikes, mainly because of hoarding (e.g. pasta, canned food, toilet papers, hand sanitisers). As a potential logistics manager, explain how you would improve your forecasting method (7 marks).