Imagine it is $2030$ in Singapore, and there is lack of manpower to run the existing form of minimarts and convenience stores. Assume that the pilot vending machine caf$$ in Sengkang has been further refined to become a one$-$stop minimart based on vending machines. It is a future space where purchases of daily necessity items and payment of bills can be made.

a$)$ Discuss the persona in detail and the problem that can be solved by using a vending machine in $2030.$

$(10$ marks$)$