Here are the rewards and requirements for the Chapter 9 Hawaii Quests. There are 6 quests in this set, they only last a week and you can only complete them on your Hawaiian Farm. Keep in mind that this quest line is only scheduled to last 1 week instead of 2 like the previous Hawaii quests.
Keep in mind Zynga likes to change the requirements and rewards around before and during a release. We will be sure to update the requirements below if they happen to change.
Get 4 Sonar Pinger, Harvest 85 Taro/Royal Taro, Harvest 55 Oysters
Rewards : Diving Bell Cow
Get 6 Diving Helmets, Harvest 65 Yellow Fin Tuna, Harvest Diving Bell Cow 1 Time
Rewards : Diving Costume
Get 8 Aqua Lamp, Harvest 110 Shrimps, Make 3 Hawaiian Kabobs
Rewards : Shipwreck
Get 10 Pineapple Slices, Harvest 150 Kona Coffee, Harvest Island Aviary
Rewards : Umbrella Paper Tree
Get 11 Tropical Trays, Harvest 230 Double Pikake, Harvest Paper Umbrella Tree 1 Time
Rewards : Tiki Waitress
Get 12 Aloha Lei, Harvest 235 Mussels, Make 4 Island Punch
Rewards : Lei Tree