6.Do you consider regular expression is a programming language (5 points)? Please give a way to decide if a language is a programming language (10 points).

9.N公司年度財務相關資料如下：年底每股股價$60、年底流通在外股數2,000,000股、年底市值對淨值比2.5、年底負債對資產比37.5%、年度銷貨收入$20,000,000、年度淨利率20%。則其年底總負債應為(9)。