Answer:
1. employee was contributorily negligent.
2. the employee assumed the risk.
3. a co-worker caused the injury.
Step-by-step explanation:
The common-law defenses available to the employer are the following:
1. contributory negligence; here, an injured person is not entitled to recovering damages if that person contributed in any way to his or her own injury
2. assumption of risk; here given that the worker was fully aware of the presence of the risk and comprehended the magnitude of the risk; then, the worker willingly exposed him- or herself to the danger
3. negligence of a fellow worker: here the employer is not liable for an injury caused entirely by a fellow worker's negligence.