tolong bantuin besok dikumpulin ini dialog certainty or uncertainty

Situation 2 :

You              : Hey dude, wanna discuss about the football match this afternoon?
Your friend   : It suppose, but I doubt it. I have to do my homework later.
You              : Are you sure about that?
Your friend   : Of course I am! Didn't you listen to the teacher? It's due tomorrow!
You              : Oh yeah, I forgot about that! I gotta do the homework too. We'll discuss it next week, deal?
Your friend  : It's a deal. Welp, I gotta go now. Bye, dude!
You             : Bye, man!

Situation 3 :

Your sister   : Hey, sis! Can you teach me this chapter about english?
You              : It's pretty late now, are you sure you wanna me to help you now?
Your sister   : Yes, I'm absolutely sure that I can handle the time!
Your            : Alright then, but you better understand it quick. We have a bedtime schedule, remember?
Your sister  : Alright sister, I'll try my best!