Instant messaging applications allow you to make voice or video calls, share files, or send messages

Introduce specialization/generalization concepts into the ER model shown in Figure 13.11 and described in Exercise 12.13 to show the following:

(a) The majority of parking spaces are under cover and each can be allocated for use by a
member of staff for a monthly rate.
(b) Parking spaces that are not under cover are free to use and each can be allocated for use
by a member of staff.
(c) Up to twenty covered parking spaces are available for use by visitors to the company.
However, only members of staff are able to book out a space for the day of the visit. There is no charge for this type of booking, but the member of staff must provide the visitor’s vehicle
license number.

What values will be in the boxes (these represent the computer’s memory) once the lines of code in have been performed? Be sure to show decimal points and full precision if the variable type is capable of holding that data!

``` int main() { int x = 76, y = 12, z = 5, c = 3; double q, r; int s, t; s = x/c + y/z + c; t = x/z + y*c/z; q = x/c + y/z + c;; r = t*z + s*c/z; ```