According to the US Office of Transportation Statistics (BTS.GOV), in 2021 there were 3,793,114 airline flights in the US. Of these, there were 67,803 cancelled flights. Based on these data, calculate the EPMO for US airlines. About what Sigma level of performance does this represent? Assume for the assignment that you had been booked on one of those cancelled flights; how do you think these calculations would affect your feelings about your flight being cancelled?