Electronic issue

This started yesterday. I want to give my mechanic a general diagnosis so I don't get charged for checking every wire in the vehicle. I would turn and the A/C would still run but the cooling would go out. Just blowing hot air. Driving on the way home, the power steering would go out turning a slow speeds (both directions and in reverse). Today I was trying to diagnose it and now whenever I turn the car's electronics restart like I just turned the key (car lurches, engine skips when I turn, etc.) Is this the battery, alternator, wiring, etc?