$8.$ Vaccine Class

Vaccine

$-$ VaccineID: int

$-$ VaccineName: String

$-$ manufacturer: String

$-$ expiryDate: String

$+$ Vaccine$()$

$+$ Vaccine$($int$,$String, String, String$)$

$+$ getVaccinationId$()$: int

$+$ setVaccinationId$($int$)$

$+$ getVaccineName$()$: String

$+$ setVaccineName$($String$)$

$+$ getManufacturer$()$: String

$+$ setManufacturer$($String$)$

$+$ getExpiryDate$()$: String

$+$ setExpiryDate$($String$)$

$+$ toString$()$: String

a$.$ How many constructors does the class Vaccine provide?

b$.$ How many methods does the class Vaccine provide?

c$.$ How many instance variables does the class Vaccine have?

d$.$ Briefly explain the purpose of the following two lines of code:

Vaccine Pfizer;

Pfizer $=$ new Vaccine$()$;

e$.$ The two lines of code can be combined into one. Provide this one line of code:

f$.$ What method is used to set the VaccineID of an instance of the Vaccine class? What data type does it expect as an argument?

g$.$ What method is used to set the VaccineName of an instance of the Vaccine class? What data type does it expect as an argument?