$12\mathrm{.}13$ Create an ER model for each of the following descriptions:

$($a$)$ A large organization has several parking lots, which are used by staff.

$($b$)$ Each parking lot has a unique name, location, capacity, and number of floors

$($where appropriate$).$

$($c$)$ Each parking lot has parking spaces, which are uniquely identified using a space

number.