Answer:
1. la grippe
2. avoir l'air fatigué (e)
3. le front
4. le doigt de pied
5. se blesser
<em>Bonjour,</em>
<em />
<em>De quelle nationalité es-tu ?</em>
Or :
<em>Tu es de quelle nationalité ?</em>
First of all: I cannot see the entire problem.
Second: This is posted in the wrong category. You have posted it in the French category, while clearly you have a Mathematical problem to deal with.
I would suggest changing the category so that people like me would be able to help you. I wish you all the best!