Change this from vertex form to standard form

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.