Final answer:
Doña Imelda's predictions using the 'ir a [infinitive]' construction are: A) Voy a ganar, B) Va a estudiar, C) Van a viajar, D) Vas a cocinar.
Step-by-step explanation:
Using the "ir a [infinitive]" construction, we can complete Doña Imelda's predictions as follows:
A) Voy a ganar (I am going to win)
B) Va a estudiar (He/She is going to study)
C) Van a viajar (They are going to travel)
D) Vas a cocinar (You are going to cook)