I've had a good look at the save, and I propose these worker orders:
Worker #1: Continue farming the rice, then put a pasture on the cow near City #2 (Coppertown). Then mine some of the grassland hills.
Worker #2: Mine the iron, then go to the grassland forest tile 1 east of NoneOfTheAbove. Chop the forest there together with worker #4 and then farm the tile. Then go to the unimproved flood plains near Riversight. Farm them.
Worker #3: Continue farming the rice, then go to Riversight and mine the forested hill 1 North of the city. Then build a road 1 NE of Riversight, going NE towards site A.
Worker (unnamed, should be changed to #4): Move to the forest tile 1 east of NoneOfTheAbove, chop it, and farm it, then move to the unimproved flood plains near Riversight, farm them. (Note: Do not group this worker with worker #2. That way 1 worker turn would be lost when farming.)