Labor economics multiple choice questions (3 Questions)

Got these three multiple choice questions wrong and was wondering if I could get some help in determining the correct answers thanks!

Incorrect Question 2 0 / 1 pts Which of the following is an example of a fringe benefit? O paid dental benefits O federal holidays off O raises O Christmas bonus O overtimeQuestion 6 Which of the following is NOT a reason incentive mechanisms are used in an organization? Tournaments induce relatively high-effort levels. Agents seek to maximize their own utilities. Workers at every level of an organization, including CEOs, are agents. Principals who own the rm have an incentive to shirk. Incentive mechanisms work by better aligning the interest of workers with the rm's prot-maximizing goals. Incorrect Question 7 0 / 1 pts The value of a worker's output ___ a simple function of the units of output produced and can be measured O is not; by objective measures O is; by both objective and subjective measures O is; by subjective measures O is not; by subjective measures O is not; by both objective and subjective measures