What are the next four multiples of the unit fraction 1/6?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

If u good at math hit me up on insta or sum @basic_jaiden or @ and