Correct pronunciation of يا واسعَ المغفرةِ

Q: I read in Sunnats by Mufti Saheb

"8.19. It is reported that Nabi used to say “YA WA SI ‘UL MUGFIRAH” after eating the first morsel - Which means, “O! The one whose forgiveness is all encompassing.” (Muslim - S.K. - Vol. 1 : Pg. 227)"

Is this with a zabar on the ayn or a pesh?

If you write the arabic with it it will be better Insha Allah.

Making a promise to Allah Ta'ala

Q: If a person thinks to himeself that "I promise Allah Ta'ala that I will not do a certain thing, or I will do a certain thing" and then he is too weak willed to carry out that oath, do they have to give kaffara? And if that happened more then once, do they have to give kaffara for each broken oath or will just one kaffara be enough? {lease bear in mind that the person was not telling anyone else, but just thinking aloud to themselves.

Last Ayah of Sura Naba

Q: I have a question regarding the last Ayat of Sura Naba which states that when the Kafir sees the Azaab on the day of Qiyamah he will say that it would be better for me if I would be clay rather than this. Will the Azaab be given to the Rooh or in an any other form besides insaan (clay) on the day of Qiyamah?