You can put this solution on YOUR website! You need the distance and direction from Milwaukee to Chicago since velocity is a vector quantity and requires magnitude and direction.
Convert the time to hours.
For the magnitude,
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Mapquest tells me 89 miles for distance. mph
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For the direction, set a reference at Milwaukee and measure the angle that way either using N-S-E-W or another convention.
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The GPS coordinates for somewhere in Milwaukee is 87.52.20 W, 42.58.32 N
The GPS coordinates for somewhere in Chicago is 87.41.4 W, 41.50.13 N
Both are in degree.minute.second format.
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Direction:
87.41.4-87.52.20=0.9.16 E
41.50.13-42.58.32=1.8.19 S