F2 can be calculated as follows: File 2 = N u m b e r o f f a i l e d t e s t s T o t a l n u m b e r o f t e s t s × one hundred (12) https://cody4bltb.ivasdesign.com/52936099/how-to-clean-sewage-in-qassim-no-further-a-mystery