Property Manager queries

Hi,

Appreciate any help.

I have the following queries on Property Manager:

1. If we for instance define a building having 100sqm then defined floors and offices but total of these only accounts for 90sqm, is there a way to know that we have 10sqm unaccounted?

2.  Can we filter the occupied vs the unoccupied spaces to determine occupancy rate? How?

3. Can we temporarily define a space as:

    3.1  "Reserved"

    3.2  Change a space from being leasable to a common area

    3.3  Breakdown spaces further, say 1 unit with 100 sqm will later on become 2 units with 50sqm each?