The sequence of transformations that can be performed on quadrilateral abcd to show that it is congruent to quadrilateral ghij is followed by

first blank could be
a. reflection across the y-axis
b. 90 degree counterclockwise rotation around point a
c. 90 degree clockwise rotation around point a
d.90 degree counterclockwise rotation around point b

second blank could be
a. clockwise rotation about point b and a translation 20 units down
b. reflection across the y axis and a translation 20 units down
c. reflection across the x axis and a translation 15 units down
d. reflection across the y axis and a translation 25 units down