The requirements reference model (below for your convenience) separates application domain and machine and see the specification (how a program should behave to satisfy the requirements under specific domain assumptions) as a bridge/interface between the two.

Consider now the following information:

Suppose that the city of Marietta decides to raise funds by instituting users fees for all the public parks. You have been contacted to design and implement a complete system of money collection, security, etc. The city is planning to collect $1 fee from each human park user on entry to park, ensure that no one may enter park without paying, ensure that anyone who has paid may enter the park. The city does not want to utilize a human collector, but it is expecting to use chain link fences for security and turnstiles with automated coin collection. It is also expecting a brand new software system to interact with the turnstile hardware.

You have been also provided the following description:

The turnstile consists of a rotating barrier and a coin slot and is fitted with an electrical interface.

This mechanical apparatus has already been chosen, and the development job is to write the controlling software

The software will run on a small computer (SUD),

The environment is the turnstile mechanism itself and its use by visitors to the park;

To enter the park, a visitor must first insert a coin and then push on the turnstile barrier, moving it to an intermediate position from which it will continue rotating of its own accord, returning to its initial position and gently pushing the visitor into the park;

The turnstile is equipped with a locking device: when locked, it prevents the barrier from being pushed to intermediate position. (The turnstile locks itself after turning far enough to let one person in).

Question 1.Using the information above, separate the different elements in the different part (and elements) of the requirements reference module. Add assumptions if you have to, but mark them as such.

Question 2. Identify all the relevant stakeholders. Briefly motivate your choices