Conduct a what-if analysis for Tunningley Services (Problem 14.21) as the travel goal varies from 30 to 90 minutes in increments of 10 minutes.

Data from Problem 14.21

Tunningley Services is establishing a new business to serve customers in the Ohio, Kentucky, and Indiana region around the Cincinnati, Ohio area. The company has identified 15 key market areas and wants to establish regional offices to meet the goal of being able to travel to all key markets within 60 minutes. The data file Tunningley provides travel times in minutes between each pair of cities.