Arch/garch

[saa]

I am using garch to model daily volatile data against economic data obtained quarterly. Can I use garch (1,2) or should I use midas? (do you have a link for me to better understand the process). I am new in using econometric but it is important for my study.

When I am using garch to estimate another regression for daily 7 days against 5 daily I get 'arch needs continuous samples'. The data has NA what should I do?

[nimcale]

please can you help me how to estimate garchsk using eviews because i have estimated all arch family but i didn't know how to estimate garchsk that is left and also i want to test diebold mariano test using eviews please help