ok heres the deal im go to hope in my car to do the brakes and when i step on the clutch its a dead pedal i pump it once and it didn't even return back up so i pop the hood and check the resorvoir and it bone dry so i put more fluild in there hope back in and pump the clutch pedal with my hand a couple of times still nothing.......so my question is should i change the slave cylinder or clutch master clyinder or both............oh and i didn't see any leaks of any kind under or in the car