A. Midterm Performance Estimate.

The performance estimate is based on Ex1 (midterm) and
the first three homeworks (ALL homeworks are considered)

NOTE 1: All first three homeworks are used as opposed to the
final grade that will drop the homework
(among the 5) with the lowest grade.

NOTE 2: Letter Grade is approximate. If for example the
	A starts at 525 and the B+ ends at 524 a 520 could
	as easily become an A as a 530 could become a B+.

X= HW1 + HW2 + HW3 + Midterm(EX1)
 0 <= X <= 600

   X     ApproximateLetterGrade
525-600          A
450-524          B+
360-449          B
330-360          C+
300-330          C
0  -300          F

 B. Statistics
     #   Mean  St.deviation Median
HW1 21  76     15          80
HW2 20  83     10          83
HW3 20  75     17          80
MID 20  260    43          270