Worldwide Charity Worldwide Charity is a charitable organization whose mission is to improve education levels in developing countries. In each country where it is involved, the organization has a small headquarters and usually 5 to 10 offices in outlying towns. Staff members communicate with one another via email on older computers donated to the organization. Because Internet service is not reliable in many of the towns in these countries, the staff members usually phone headquarters and use a very simple Linux email system that uses a server-based network architecture. They also upload and down- load files. What range of frame sizes is likely to be used?