To compute $A_{proj}=(u_A, v_A)$:

1. subtract $c$ from $A$: $(1, 1, 1) - (2, 3, 5) = (-1, -2, -4)$
2. divide $(x_A, y_A)$ by $z_A$ to get $(u_A, v_A) = (-1/-4, -2/-4) = (1/4, 1/2)$.

Yep—great! But don't calculate them all, because then people will just steal the answers from the web next year. :-)