FF Homework: (a) Let T : [R3 -> R3 be projection onto the liney = -%x Find a matrix formula for T|: y x J and [7], as on page 11. (b) Let T : R2 -r R2 be reection about the liney = %x Find a matrix formula for T|: x :l and [T], as on page 12. . J' Direction vector v for the line (e) Let T : R3 -> R3 be projection onto the plane 2x y + : = D. X T is linear. Find a matrix formula for T y , and [T]. , (d) Let T : [R3 > [R3 be reection on the plane 2x y+ : = 0. plane I T is linear. Find a matrix formula for T y and [7] (e) Let T : R3 -> R3 be reection on the plane through A(-2,3, I), B(l,2,l).and the origin in R3. J: Find a matrix formula for T y and [T]. Hint: Proceed as in (d). . > > The normal vector to the plane [5 n = (M x OB