no exaplanations neededno explanations needed(just give me direct answers)

Question 2 6.67 pts Given the following: let defaultAudioLevel = 0.5 var userSetAudioLevel: Double? var audioLevel = userSetAudioLevel ?? defaultAudioLevel Which of the following is used in the Swift code? Nil-Coalescing Operator Optional Chaining Range Operator Subscripts Question 4 6.67 pts Match the lines of code with the the Swift language features being used. Choose the most correct match. var age = user?.age [ Choose ] var color = colorSetting ?? default Color [ Choose ] 4 let cover = book?.cover ?? blank Cover [Choose ] Nil-Coalescing Operator Subscripts Range Operator and Subscripts Optional Chaining Optional Chaining and Nil-Coalescing Operator Range Operator Question 5 7 pts Given that user is an User optional type and User has a property called name: var name = user?.name Which of the following is used in the Swift code? Nil-Coalescing Operator ooo Optional Chaining Range Operator Subscripts