F2 could 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 × 100 (12) Moreover, https://zionzm4t6.bcbloggers.com/30520992/the-smart-trick-of-how-to-clean-sewage-in-qassim-that-nobody-is-discussing