One workout left in Week 3! Today, you'll test yourself by going to failure on the last set of squats, using good form to prevent injury. There's no point in getting sloppy to bust out extra reps; you'll just mess up your numbers for the next week, and risk hurting yourself in the process.
Hammer out the rest of your leg workout when you're done, but leave a rep in reserve when doing the calf raises. You'll have jelly legs when you limp out of the gym, but they'll recover tomorrow!
5 sets of 5 reps, go to failure on final set