What time does this clock show?

What time does this clock show?

Time A shows the time that Owen started tummy time. What time did Owen start tummy time?

Time B shows the time Owen stopped tummy time. What time did Owen stop tummy time?

How long did Owen spend doing tummy time?

Caleb started independent reading at 12:25. He finished reading at 1:05. How many minutes did Caleb read for? Show your work.
Darius and his friends jumped on the trampoline for 55 minutes. They started jumping at 6:45. When did they stop jumping? Show your work.
Jacob and Mary solved this problem - Mrs. Brummett's class went to the library at 9:55. They spent 15 minutes at the library. What time did they leave the library?
Jacob answered - 10:10
Mary answered - 9:70
Who is incorrect? What was their mistake?