Pentagon W X Y Z V is translated up and to the right to pentagon W prime X prime Y prime Z prime V prime. Pentagon W prime X prime Y prime Z prime V prime is rotated about Z prime 180 degrees to form W double-prime X double-prime Y double-prime Z double-prime V double-prime. What is the final transformation in this sequence of transformations mapping pre-image VWXYZ to final image V''W''X''Y''Z''?

a translation up and to the right
a reflection across point Z'
a rotation 90° about V'
a rotation 180° about Z'