Exercises are in order:
Estimated Workout time: 28 minutes

1. 4 sets of Leg Extension Click here for leg exercises
2. 3 sets of Leg Press or Squats
3. 3 sets of Hamstrings Curl
4. 3 sets of Calf raise

Keep in mind that these were just the exercises that I picked, you can easily substitute other exercises for each muscle group.