Motivation 1 : *Fee for Knocking my door*One of the houses I deliver newspaper had its mailbox blocked, so I knocked on the door.Mr. Banerjee, an elderly man with unsteady steps, slowly opened the door. I asked, "Sir, why is your mailbox blocked?"He replied, "I blocked on purpose."He smiled and continued, "I want you to deliver the newspaper to me every day... Please knock the door or ring the bell and hand it to me in person."I was puzzled and replied, "Sure, but that seems inconvenience for both of us and a waste of time."He said, "It's all right... I'll