c. Airbnb had its IPO about a week after the Pfizer/BioNTech Covid-19 vaccine was approved for use in the UK. In addition, in the weeks running up to the IPO there was positive news about the efficacy of vaccines from Moderna and Astra Zeneca. Do you think this news is relevant to the price of Airbnb shares? If yes, in what way? d. Obtain a plot of the closing daily share price of Airbnb shares from the date of the IPO until September 2023. What do you notice about this plot? What factors might have impacted on the share price since the IPO? You do not need to relate specific factors to specific price changes, rather discuss the types of factors that might be relevant