write who-questions to the following sentences

bess could read books when she was 6

don could ride a bike when he 4

mary could work on the computer when she was 8

ted and tim could ride a horse when they were at school

mr green could drive a car when he was 22

Who could read books when she was 6?

Who could ride a bike when he was 4?

Who could work on the computer when she was 8?

Who could ride a horse when they were at school?

Who could drive a car when he was 22?