Исправьте ошибки в глагольных формах/времени в этих предложениях. this car is making a funny noise. i think the engine is going to stop. their wedding is being on may 29th next year. i don’t know which t-shirt to buy. i know! i’m going to buy all of them!

a. This car is making a funny noise.I think the engine is stopping.
б. Their wedding is on May 29th next year.
в. I don't know which T-shirt to buy.I know! I'll buy all of them!