Group H has an average of 1,200 employees. An average of 60 employees leave the company every month and 60 new employees are employed there. A total of 500,000 won will be spent on hiring and training a new employee. a) What is the average length of time an employee works in Group H? b) H Group's HR manager wants to increase loyalty by paying special vacation fees to new applicants hired this year, and as a result, increase the average working period of new employees to an average of two years (24 months). What is the maximum annual budget allocated for average vacation payments (assuming that this year's budget (employment and training costs + total vacation payments) cannot be increased compared to last year.) Hint: If employees work an average of 24 months like this, how much can the company save in one year in terms of employment and training?