So we know that 60 minutes are in and hour soooo what you can do for the first one is divde 60 by four which is 15
so he spent 15 miuntes completing the first assinmnet.
For the second one we can divde 60 by five divide it by five and teell me what you get after that just multiply that number by 2 : )
I would like you to learn the operations for this....