1990 Pontiac 6000 Car does nothing

Electrical problem
1990 Pontiac 6000 6 cyl Automatic

when I turn the key the car does not crank or make any noise the radio doesnt turn on the locks and windows dont work and the insde latch to open the hood doesnt wokr also the key to open the trunk and doors doesnt work either what could be the problem because the cars does nothing