How do I approach the question below.

A producer of a new range of energy drink introduces their product at R25 per can. After a month of sales, they introduce a special of R 40 for two cans. A month later they sell the product at the original introductory price. They subsequently introduce another special after another month of R 45 for two. After a month of sales, they re-introduce the original special of R40 for two and this special is kept on-going for numerous months thereafter. Use price elasticity theory to show why, ceteris paribus, the producer settles at the initial special of R 40 for two. In your discussion, include a comment on the type of price elasticity observed with the demand for this energy drink at these prices.

Assume that a perfectly competitive hand sanitiser market is in long-run equilibrium. The price of hand sanitisers is observed to increase during the COVID 19 pandemic, and then it returns back to its normal price after the pandemic. Use the diagram below to discuss this market before, during and after the pandemic. Include in your discussion the profit levels in each case