Final answer:
Eduardo can solve his software compatibility issue by finding a file converter, requesting the file in a different format, upgrading his software for better compatibility, or accessing the file on a compatible computer.
Step-by-step explanation:
Eduardo is facing a common problem with software compatibility when it comes to opening a file created by a different program. To address this issue, Eduardo has several options. He can attempt to find a suitable file converter online that can convert the file to a compatible format his word-processing software can open. Another solution could be to ask the manager to save and send the file in a different format that Eduardo's software can read. If these options are not feasible, Eduardo may consider upgrading his software to a newer version that can handle files created with more advanced programs, respecting the principle of upward compatibility. Lastly, Eduardo could also use a compatible computer with the necessary software at his workplace or another location to access the file.