Note that the travel times are slightly different because of one-way streets and detours, depending on the direction (asymmetrical). (a) What is the best routing sequence for the delivery truck? (b) If loading or unloading times are significant, how might they be included in the analysis? (c ) Retail store 3 is located in such a densely populated urban area that the travel time to and from this point may increase by as much as 50 percent, depending on the time of day. Travel times for the other points remain relatively unchanged. Would the solution in part (a) be sensitive to such variation?