Okay so i went to leave the auto parts store, and i started the jeep and it was running weird with a loud screeching and then it died. Tried to turn it over and it slowly turned over and had a loud screeching when turning. Well someone got jumper cables, hooked it up, and then nothing at all when turning the key, not even a click. So i got underneath, tapped on the starter with a hammer and then tried to start again but slowly and it had the screech noise, well it didnt start, then tried to turn it again and nothing. So this time i had someone turn it over while i hit it with a hammer, and it sparked everywhere every time i hit it. Bad starter?