Count hours (9hrs per day Mon-Thursday) 4 hours every Friday between dates

[qwer123]

I want to count working hours only between two different dates but I have weird condition as I want to count "9 hours" as per day between Monday to Thursday and 4hours every Friday.
Saturday and Sunday are non working days + calendar holidays. I'm super stressed and I did not find solution even I watch all youtube and google so much.. can someone rescue me please? attached excel sheet. Thanks in advance. God Bless you!!

 

[Belleke]

=(D6*9)-5

 

[Belleke]

Example.

 

[qwer123]

Example.

Thanks Belleke. If there will be no Friday will it will still do -5. I don't know if it works! I want a conditional formula that applies as count everyday 9hours (Mon - Thursday) and count 4 hours every Friday - Days should be detected automatically. for example if there is 2 Fridays then 4 hours each Friday should be automatically counted.

 

[Belleke]

Does this help?
see green cells

 

[mohamed ilyas]

check this.

 

[qwer123]

Guys you are the besssssssssssssssssssssssssssst!! You have make my day and life easy!! Stay always best.... EXPERTS!!!