Joe, age 52, has just started a consulting company. He currently employs six people, who range in age from 22 to 31 years old. Joe estimates the average employment period for his employees will be approximately three years and would like to implement a retirement plan that will favor older participants while including an appropriate vesting schedule. In addition, Joe would like the employees to bear the risk of investment performance within the plan. Finally, he wants the discipline of the plan having mandatory annual contributions. Which type of retirement plan would you recommend? (5 pts)