Write the 3 × 3 matrix that would represent the transformation listed.
a. no change when multiplying (the multiplicative identity matrix)
b. no change when adding (the additive identity matrix)
c. a rotation about the x-axis of theta degrees
d. a rotation about the y-axis of theta degrees
e. a rotation about the z-axis of theta degrees
f. a reflection over the xx-plane
g. a reflection over the yy-plane
h. a reflection over the xx-plane
i. a reflection over y = x in the xx-plane