为下面的每一个功能写一个函数，并在主程序函数调用。

 　　计算平均税后收入，并输出每个人的税后收入；

 　　检测收入不能满足支出人的情况，并输出姓名、收入和支出

 　　计算平均还贷款额，并输出还贷款额低于平均水平的人的姓名、收入、支出

 　　写个函数实现：按照冒泡法对上表的名字进行排序，并排序后顺序输出姓名、收入、税收和支出。-Each of the following function to write a function, and in the main function call.

　calculation of average after-tax income, and the output of each person s after-tax income

　detect people s income can not meet expenses, and to output the name, income and expenses

　calculation of the average loan amount and the repayment amount is less than the average output level of the person s name, income, expenditure

　write a function to achieve: a bubbling method in accordance with the table name sort order and sort output after the name, income, taxes and expenses.