input: Write a python function to plot a bar graph of employee names versus their ages using matplotlib.
  assert plot_employee_ages(['John', 'George', 'James'], [30, 22, 25])==None
  assert plot_employee_ages(['Alice', 'Bob', 'Charlie'], [28, 34, 29])==None
  assert plot_employee_ages(['Diana', 'Eve', 'Frank'], [26, 31, 27])==None
output: def plot_employee_ages(names, ages):
      import matplotlib.pyplot as plt
      
      plt.bar(names, ages)
      plt.xlabel('Employee Names')
      plt.ylabel('Ages')
      plt.title('Employee Names vs Ages')
      plt.show()