Provide a description of how the geometric linear transformation T acts on any vector x = [x, y] in R². For example, an answer could look like "T : R² -> R² that first reflects points over the origin, then projects onto the x-axis."

(a) T(x) = [3, 0], [0, 5] [x, y]
(b) T(x) = [0, -1], [-1, 0] [x, y]
(c) T(x) = [5, 0], [0, 0] [x, y]