Observation

The few candidates that attemted this question did well by:

-           giving correct discription of the doors and windows;
-           using appropriate conventional symbols to show the doors and window types;
-           stating the various doors and windows sizes correctly.

However, they did not:
-           indicate the quantity of each of the doors and windows;
-           draw the doors and windows to scale 1:25 as specified.

The expected response to question 4 is as given below: