Summer holidays: The company Tui, which sells holidays to 180 countries, has suffered heavy losses due to the pandemic. In the three months to the end of December, revenues fell 88% from 3.8bn to 468m.Tui is expecting a recovery in the market for summer holidays this year due to the vaccination programme. Source: Adapted from A. Hancock (2021), 'Step change, Tui prepares for summer recovery', The Financial Times (10th February). 1. What factors will affect the demand for holidays this Summer offered by Tui? Include graphical analysis