The COVID-19 pandemic in Bangladesh is part of the worldwide pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The virus was confirmed to have spread to Bangladesh in March 2020. Now suppose, Bangladesh's nationwide vaccination program will begin very soon. And as a member of a renowned database company, you are asked to build a website to keep track of registration as well as vaccine-related information. This website will contain forms; a registration form for the applicants and another form for reporting any adverse event to the healthcare system. The reporting form will have options to fill in the information about the applicant, reporter (person who has reported this event to the healthcare system and also completed this form), vaccination center as well as vaccine detail. At first, applicants have to choose the relevant category from all given categories of professions. After that, the user has to input their NID number and date of birth. The system will then automatically fill in  other details (name, age, gender), collecting information from the NID database. The applicant has to give  details of their medical history (i.e., whether they have diabetes, cancer, hypertension, or other diseases).  The user also has to input their present address and mobile phone number. After entering all these, a  vaccine card will be generated, which will mention where and when the person will be vaccinated with the first and second doses. For each vaccine, vaccine as well as supplier’s name, date of vaccination, time of vaccination, dose (i.e.,  first or second) will be recorded. The system must record which vaccine is given to whom (applicant).  Reporter’s will have…..

 a. Now, you may have already noticed that this scenario is incomplete. At first, you have to complete the remaining portion of this scenario including all possible information that you would like to maintain.

 b. After completing the scenario, propose an Entity-Relationship diagram that captures all the  information. Be certain to indicate primary keys, relationships, participation constraints, and  cardinality constraints