△ ABC has vertices A(1,3), B(2,5) , and C(5,3). If the coordinates of B' are (-4,6) , what sequence of transformations mapped △ ABC onto △ A'B'C' ?
a. Transformation of (x,y)to (-y,x) , then translation of 1 unit to the right, and 4 units up.
b. Rotation of 180° , then a translation of 1 unit to the left.
c. Translation of 1 unit to the right, and 4 units up, then a transformation of (x,y)to (-x,y)
d. Reflection over the £ -axis, then a transformation of (x,y)to (-y,x).