The Bangladesh government is planning for an E$-$voting system to cast the votes of every citizen of the

country at the exact time with appropriate results. Following is the initial proposal of it$.$

Every voter first inputs their NID number and Fingerprint into the system. Verify identity process

receives this data and compares the NID with existing data from the NID data store. It also extracts the

existing fingerprint from the data store and forwards it to compare the fingerprint along with the new

fingerprint $($i$.$e$.$ given by the citizen$).$ The process uses the Neural Network technique and sends back

the match result. Based on the result, the verify identity process sends Invalid fingerprint messages to

the voter. The show candidate process collects the list of all candidates from the candidate data store

and sends it to the voter. The voter then chooses his$/$her favorite candidate and the casting vote process

receives it and stores it in the votes. It also sends an acknowledgment to the voter.

Administrators can request total voting information to generate reports. It collects all voting information

from the Votes data store, prepares a report, and sends it to the administrator. In the end, the admin can

declare the election result. There is also the presiding officer who can send start$/$stop signals to the

voting status process. He can also pause the voting system in case of any emergency. Another

responsibility of the presiding office is to add new candidates to the system.

Design a context diagram based on the above scenario.

Design a level $1$ diagram using the above scenario. Also, identify if there is any error in the diagram.