For three matrices of equal size, a, b, and c, where a represents a reflection across the line y = x, b represents a
counterclockwise rotation of 45°, c represents a reflection across the y-axis, and x =
:
a. show that matrix addition is commutative: a+ b= b+ a
b. show that matrix addition is associative: a+ (b+ c) = (a+ b) + c