No	ID	P1	P2	P3	Attendance	Final
1 	**17	A	A+	A-	-1		A
2 	**14	A+	A+	A	-0		A+
3 	**48	A	A	A-	-1-1-1		A-
4 	**30	A-	A	A+	-1		A
5 	**82	A+	A	A	-.5-.5-.5-.5	A
6 	**62	A	A+	A+	-1-.5-1		A
7 	**37	A+	A+	A+	-1		A+

Pk (k=1,2,3): kth presentation

Attendance: -0: no absence; -1: miss one class; -.5: very late for class.

Final: Every (-1) will take one of your presentation grade down on scale, e.g., from A+ to A. The final grade will be the median of P1, P2 and P3.