Jo Yu, vice president of Broadtech, Inc., a distributor of PC clone computers located in San Bernardino, California, must travel to the port of Los Angeles, located in San Pedro, California, to pick up a shipment of computers from Taiwan. A freeway map of southern California with distances in miles shown on the arcs is given.

a. What route should Jo take to minimize the distance between his office and San Pedro?

b. Suppose Jo is traveling during the morning rush hour. Jos average speed on east-west routes during rush hour is only 25 miles per hour, whereas he averages 40 miles per hour on north-south routes. (The routes considered east-west routes are in black; the north-south routes are in blue.) What route should Jo take to minimize the travel time between his office and San Pedro?