The issue is that new employees are not able to print to the main networked copiers from their workstations after Switch 3 was added to the stack. Looking at the port configurations for Switch 3, we can see that the ports for printers (Ports 13-24) are shut down.
A . Enable the printer ports on Switch 3: This should be done because, as per the configuration shown in the image, these ports are currently shut down. Enabling them would restore connectivity for printing.
E . Reconfigure the VLAN on the printer ports on Switch 3: The VLAN for printers is set to 80 on Switch 3 while it is set to 60 on Switches 1 and 2. Changing VLAN of printer ports on Switch 3 to match with other switches (VLAN60) will ensure that they are all in the same broadcast domain and can communicate effectively.
The duplex settings do not need reconfiguration as they are already set to full duplex across all switches which facilitates efficient two-way communication.
Reference:
CompTIA Network+ N10-008 Certification Study Guide, Chapter 3: Network Devices, page 115-116 CompTIA Network+ Certification Exam Objectives, Domain 2: Network Implementations, Objective 2.1: Given a scenario, install and configure the appropriate networking devices, Sub-objective: Configure switch ports Ace Your CompTIA Network+ Exam: Explore Top Study Resources, Section: CompTIA Network+ Certification Kit: Exam N10-008 6th Edition