show on excel please
Telephone calls from New York to Los Angeles are transported as follows: First the call is sent to either Chicago or Memphis; then it is routed through either Denver or Dallas; and finally the call is sent to Los Angeles. The number of phone lines joining each pair of cities is as shown in the table below. Using a network flow model, determine the maximum number of calls that can be sent from New York to Los Angeles at any given time.
Cities # of Telephone Lines
N.Y. - Chicago 500
N.Y. - Memphis 400
Chicago - Denver 300
Chicago - Dallas 250
Memphis - Denver 200
Memphis - Dallas 150
Denver - L.A. 400
Dallas - L.A. 350