SS for Software Development

[Mask1114]

I'm doing software development and was wondering what my SS will be. I've had 4 SACs'

1 - 95
2 - 85
3 - 81.5 (82)
4 - 88

That is an average of ~ 88. What will my SS be if I get a:

i. B
ii. A
iii. A+

for my exam?

Also is it true that if you do well in the exam (this also applies to other subjects such as English) it will boost my SAC scores?