The two primary types of retirement plans employed are defined benefit plans and defined contribution plans. Please explain the structure of each, how they are funded, and how they pay benefits to retirees. Please also discuss the risks associated with

The two primary types of retirement plans employed are defined benefit plans and defined contribution plans.  Please explain the structure of each, how they are funded, and how they pay benefits to retirees.  Please also discuss the risks associated with each type of plan and who those risks primarily impact (the employer or the employee).