Homework... Direct vs. indirect.

Turns out that direct and indirect doesn't apply to an entire matrix. If you can get from one point to another with nothing interrupting it is direct, and if you have to go to another point first it is indirect.
a->b = direct a->b->c= indirect
REMEMBER THIS:
A= AB
A^2= A_B
A^3= A_ _B
A^4= A_ _ _B
And so on...

REMEMBER THIS:
If they ask you for a total node to itself connection matrix through AT MOST 2 relays you have to add [A]+[A]^2+[A]^3