In the diagram, WXYZ is a rectangle with diamension 8cm by 6cm. P, Q, R and S are the midpoints of the rectangle as shown. Using this information calculate the area of the part of the rectangle that is not shaded

• A 25cm\(^2\)
• B 24cm\(^2\)
• C 16cm\(^2\)
• D 12cm\(^2\)