Read the following passage carefully and answer the questions given below: [4]All the housewives who went to the Kalpatharu Supermarket in Bangalore had one great ambition: to be the lucky customer who did not have to pay for her shopping. For this was what the notice just inside the entrance promised. It said: ‘Remember, once a week, one of our customers gets free goods. This may be your lucky day!’For several weeks Mrs. Sen hoped, like many of her friends, to be the lucky customer. Unlike her friends she never gave up hope. Her kitchen was full of things which she did not need. Her husband failed to discourage her. She dreamed of the day when the manager of the Supermarket would approach her and say: ‘Madam, this is your lucky day. Everything in your basket is free.’One Saturday morning, Mrs. Sen finished her shopping and left the Supermarket but soon she discovered that she had forgotten to buy tea. She rushed back, got the tea and went towards the Cash-desk. As she did so, she saw the manager of the Supermarket come up to her, ‘Madam’, he said holding out his hand, ‘I want to congratulate you!’ You are our lucky customer and everything you have in your basket is free!’19. ‘It’ said What does ‘It’ stand for?20. What happened on lucky days?21. Why did Mrs. Sen buy things which she did not need?22. Why did Mrs. Sen go to the Supermarket again on the last day of the week?​