Task: Question Answering
Input (English): Problem: in a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates ( 0, 4.5 ), ( 8, 0 ), ( 0, - 4.5 ), ( - 8, 0 ) ?
Options: a. 56, b. 72, c. 112, d. 116, e. 120
Output (English): b