Consider a situation where p(a) = 4/5 and p(a and b) = 1/2. if the events are independent, then what is p(b)?

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