Jumuah

Laughing during the Jumuah Khutbah

Q: Does laughing during Friday Khutbah invalidate the prayer and break wudu? 

Today, our Imam was telling us about a man who came drunk to Janazah, and the Imam made a funny impressions of the man which made me unintentionally snort in laughter and the person next to me (and likely several others) to smile and barely resist laughing. I wasn't sure whether to get up and redo my wudu again so I stayed seated and later prayed the rakah after Khutbah as normal. 

Did this invalidate my Jummah prayer and break my wudu, or does laughing only invalidate it while I'm praying the rakah?

Delaying the four sunnah before jumuah while in the haramain

Q: My family and I will be going for Umrah this month. My question is around the 4 sunnah of Jummah. 

We know that the azaan is given before zawaal and we cannot perform these 4 rakaats. Do I perform it immediately after the 2 fardh or do I read the 4 sunnah after the fardh, then the 4 sunnah that I missed, then the 2 sunnah and then 2 nafl?

Imaam pausing in the middle of the khutbah to make an announcement

Q: During the Jumu'ah Khutbah (the second Khutbah) the Imaam stopped in the middle of the Khutbah and made an announcement saying "whilst the Khutbah is on we are not allowed to talk". 

1. What is the ruling, will this nullify the Khutbah or not? 

2. What is the ruling with regarding to stopping the Khutbah to make an announcement? 

3. Will the Jumu'ah have to be made Qadha of?

Imaam standing on the Mimbar after the khutbah and making an announcement for straightening the saffs

Q: 

1. After the Khutbah on Jumu'ah, can the Imaam continue standing on the Mimbar to see that the Masjid is being filled and there are no spaces? 

2. After the Khutbah on Jumu'ah, can the Imaam continue standing on the Mimbar and make the announcement for straightening the Saffs? 

3. What is the ruling regarding waiting after the Khutbah on Jumu'ah to let the Masjid get filled?