Why does one wash hands and recite the blessing a second time before eating matzah?
Halacha 5: one washes hands again because he became distracted during the reading of the Haggadah, invalidating the first washing.
Question 2
If someone has no wine on the Seder night, how does he make kiddush?
Halacha 11: one who has no wine on Pesach night makes kiddush over bread, just as one does on Shabbat.
Question 3
In a place where the custom is NOT to eat roasted meat on the Seder night — why is it forbidden?
Halacha 10: where the custom is not to eat roasted meat, it is forbidden as a decree lest people say it is the Pesach sacrifice.
Question 4
If someone has only one k'zayit of guarded matzah — when does he eat it?
Halacha 12: he finishes his meal with non-guarded matzah, then recites the blessing for eating matzah and eats the guarded k'zayit last, tasting nothing afterward.
Question 5
If the ENTIRE group fell asleep during the Seder meal and then woke up — what is the ruling?
Halacha 13: if the entire group fell asleep and then woke, they may not eat again — the group is treated like an individual who fell asleep.