Complete the text with had to, didnt have to, could or

Complete the text with had to, didnt have to, could or couldnt. Jack 1 _______________ play the guitar until he was fourteen years old. This was because he didnt have time. He 2 _______________ help his father in the family shop every day. He 3 _______________ work on Saturdays, but there was still no time for music. When he was fourteen, his father sold the shop and his son 4 _______________ have the guitar lessons hed always dreamed of.