A flat quadrilateral plate finite element is shown.(a)    Describe and perform a test, usi...

A flat quadrilateral plate finite element is shown.

(a)    Describe and perform a test, using two cross products that will verify if all four nodes (corners) he in the same plane.

(b)   Determine the unit outward normal direction to the surface (i.e., pointing away from the origin).

(c)    Determine the surface area of the element.

Figure 2.98