2. A survey of residents in an apartment complex shows that 75% have used FoodTurtle delivery app during the COVID-19 lockdown. 45% of existing users continue to use FoodTurtle app after the lockdown is lifted. Meanwhile 9% of the residents do not use the app during and after the lockdown. (a) Determine the probability that a resident used the FoodTurtle app during and after the lockdown. [2 marks] (b) If a resident did not use the app during lockdown, determine the probability that he/she will use it after the lockdown. [2 marks] (c) Find the probability that a randomly selected resident used the app during or after lockdown. [3 marks] (d) Determine the probability that a resident will not use the app after lockdown given that he/she was a customer during the lockdown. [3 marks]