An "ABC" University's Central library issues books to the staff and students. Students can avail

$3$ books and staff can avail max of $5$ books. The books are issued to the students for a period of

one month. Thereafter a fine of Rs$.\frac{1}{-}$ for each day is charged. The faculty members don't pay

any fine. However, they have to return the book at the end of semester. The Library receives the

requisition from various departments to new books. Once it is approved the order is placed to the

various vendors. University gives an order of the books to a particular vendor on the competitive

prices they offer.

Questions:

Q$2\mathrm{.}1.$ Create a sequence diagram for all scenarios of a student actor. $[7\mathrm{.}5]$

Q$2\mathrm{.}2.$ Create a sequence diagram for all scenarios of actor staff. $[7\mathrm{.}5]$

Q$2\mathrm{.}3.$ Identify the reference "ref" scenarios that can be used in both diagrams i$.$e$.,$ of actor and

staff. $[5]$

Q$2\mathrm{.}4.$ Create an overall sequence diagram for the above scenario including all the objects and

label it with frames "alt", "opt" and "assert" if used in the diagram. $[5]$