Write list comprehensions to compute a list of all female

Question

Problem

Suppose that an employee record consists of an employee's name (a string), age (an integer), gender (female or male), and grade (managerial, clerical, or manual). You are given employees, a list of employee records. Write list comprehensions to compute the following:

(a) a list of all female employees;

(b) a list of all male employees over 60 years of age;

(c) a list of the names of all managers. Also write an expression to compute

(d) the mean age of all female clerical employees.