Sha'ban

As-Salamu `alaykum. Can we fast in the last five days before Ramadan starts? Jazakum Allahu Khayran.

Respected scholars, as-salamu `alaykum. If I missed fasts in the previous Ramadan and I did not make them up, what should I do? Should I make up for them or fast the recommended fasts in Sha`ban? Jazakum Allahu khayran.

As-salamu `alaykum. May Allah reward you abundantly. My question is: Are there any specific days in the month of Sha`ban in which fasting is commendable? Thanks.

Respected scholars, as-salamu `alaykum. Is it permissible to fast after the middle of Sha`ban? I heard that the Prophet (peace and blessings be upon him) forbade fasting after halfway through Sha`ban.  Jazakum Allahu khayran.

As-salamu `alaykum. I have heard a lot of Muslims talking about the 15th of Sha`ban as a time for fasting and extra worship, yet I have never read any authentic hadiths to support this. What is your opinion regarding that?

Respected scholars, as-salamu `alaykum. Is it recommended to fast frequently during the months of Rajab and Sha`ban or not? Jazakum Allahu khayran.