Newton's Second Law for Rotational Motion About a Fixed Axis?

Question

A rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 75 kg. A person pushes on the outer edge of one pane with a force of F = 52 N that is directed perpendicular to the pane. Determine the magnitude of the door's angular acceleration.

Answer 1

T = F*d = I*alpha

I = (1/3)*M*d^2

In both cases, d is the distance from the axis to "the outer edge of one pane", "as shown in the drawing".