For the subspace below, (a) find a basis, and (b) state the dimension.
{[3a + 6b - c, 12a - 4b - 4c, -9a + 5b + 3c, -3a + b + c] : a, b, c in R}
a. Find a basis for the subspace.
A basis for the subspace is { }.
(Use a comma to separate vectors as needed.)
b. State the dimension.
The dimension is