Вопрос:

2 How old was he when he started playing a musical instrument?

Ответ:

Краткое пояснение: В тексте указано, что Joey начал играть на музыкальном инструменте в шесть лет.

He was six years old when he started playing a musical instrument.

Ответ: He was six years old when he started playing a musical instrument.