Corie is a development engineer for a company that manufactures solar panels for both residential and commercial purposes. Her company uses PERT network software for all development projects. As she nears the final month of her timeline for completing a new panel, Corie will focus on those activities that are

Critical path of the PERT network.

Explanation:

Corie as a development engineer must take into consideration the things that would primarily determine the completion of  a new panel projects given to her. she must always be on the critical path of the PERT network project.

Making use of the PERT network software such as diagrams or charts makes it easier for the project to be finished on time.

(a) oldest