please if you can teach explain

An employer hires an employee who generates output that depends stochastically on her level of effort. The employee chooses either to exert low effort, er, moderate effort, ey, or high effort, ex- The cost of exerting low effort is 0, of exerting moderate effort is c > 0, and of exerting high effort is 3c (i.e., three times as large as the cost of exerting moderate effort). There are two possible levels of output, IL and Ty, where It