Think of what you would say if you were them

Situation 2
Siti: "Good luck with the race, Dayu! I hope you'll win!"

Situation 3
Beni: "That's great, Edo. Have a save trip!"

Situation 4
Udin: "Congratulations, Lina! You deserve it! I wish the best of your studies!"

Situation 5
Udin: "I'm so happy for you! I hope you'll be the next OSIS Chairman, Beni!"