Belt issue . . .

the belt connected to my alternator is slipping due to it being loose anyone tell me how to tighten it, and how to replace the belt period thanks :)

never mind how to change the belt i found out the alternator belt is the wrong one and starting to wear which showed why when i started driving fast the car's belt came undone now i have to change it out i just don't know how to get the belt off with the belt controlling the water pump off can i get a little help thanks

um...english please.