Please help me with this

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

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

To determine the number of deer in a forest a forest ranger tags 280 and releases them back