A highway centerline sub grade elevation is 985.20 ft at station 12+00 and 993.70 ft at 17+00 with a smooth grade in between. To set blue tops for this portion of the centerline, a level is setup in the area and a plus sight of 4.19 ft taken on a benchmark whose elevation is 992.05 ft. From that HI, what rod readings will be necessary to set the blue tops for the full stations from 12+00 through 17+00?