12. If the MRP of the last worker hired is lower than the wage rate, the firm has (LO3) a) hired too many workers b) hired too few workers c) hired the right number of workers 13. If the wage rate is higher than the MRP of the last worker hired, (LO3) a) the firm might be able to profitably hire at least one more worker b) the firm has already hired too many workers c) there is no way of knowing whether the firm has too few or too many workers