Final answer:
Steve is an Agricultural Equipment Operator, using machinery to harvest crops, while Devan is likely a Farm Equipment Mechanic or Service Technician, responsible for repairing the machinery.
Step-by-step explanation:
In the scenario provided, Steve appears to function as an Agricultural Equipment Operator, given that he is directly involved in the operation of machinery to harvest wheat. Conversely, Devan seems to serve in the role of a Farm Equipment Mechanic or Service Technician, as he is tasked with repairing the malfunctioning engine of Steve's harvesting equipment. Upon the equipment's repair, Steve resumes his agricultural operations, illustrating the interconnectedness of various professional skills in maintaining the productivity of a modern farm.