I propose the following city placements:
Placement 1 Red:
Yes, I know the border is drawn wrong on this one, give me a break. Anyway, the access to the sea/coast should be plenty to give the city enough food to grow, and the surrounding hills/forests should make it a production powerhouse. Also puts us into range for Bronze.
Placement 2 Blue:
It isn't going to be much of a city, but the nearby sea/coast should make it grow pretty fast, and if any resources pop-up in that area... then all the better.
Placement 3 Lime Green:
4 hill inside of the city radius, pigs, and easy access to the sea/coast. Hopefully one of those hills will have iron on them, making this city a production and growth powerhouse.
Placement 4 Aqua:
Fresh water and sea/coast nearby. Should grow pretty fast, and have little health concerns. Don't think it'll do very good production wise though.
Placement 5 Pink:
Sea access and plenty of hills/forests in the radius. Should turn out to be pretty powerful.
*None of these are numbered by which order we should settle them. IE: We don't have to settle Placement #2 right after placement #1.