(a)Jessica visited a big departmental store, Pick and Pay, to purchase a leather jacket. The jacket she wanted was on sale at $800 million but was being tried on by an elderly and valued client of the establishment, Mrs Moneybags. As soon as the client put the jacket down Jessica picked it up and took it to the front desk. On seeing this, Mrs Moneybags quickly made up her mind to purchase the jacket and demanded that Jessica should give it up so that she might purchase it. The proprietor of Pick and Pay department store, Mr Favours, took the leather jacket from Jessica and gave it to Mrs Moneybags. Jessica feels a deep sense of grievance and is now contemplating the possibility of suing the department store for ‘breach of contract’.Required:In relation to the law of contract, explain whether or not Jessica can successfully sue Pick and Pay department store for breach of contract. (5 marks)

试述中国古代行政组织的特点。