The following table presents the operating data for Polar Air Cargo over 10 years from 2010 to 2019 including total RTM, LF, ATM, and Cargo Volume (or Revenue Tons Enplaned). According to the paper by Cachola et al. (2017), the weight for each of the above four KPIs in measuring the overall operational competitiveness of cargo airlines is 0.0791 for RTM, 0.0692 for LF, 0.0593 for ATM, and 0.0494 for cargo volume. Modify these four weight values and then use the data provided along with your modified weights to calculate the annual overall operational performance of Polar Air Cargo over the years from 2010 to 2019. Which year has the highest (lowest) overall operating performance score for Polar Air Cargo? Table 3. Polar Air Cargo's Operating Performance RTM 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 (billion) 1409 1220 1148 1182 1952 2591 2680 2794 2702 2718 LF 80% 76% 66% 72% 75% 72% 69% 77% 76% 68% ATM (billion) 1766 1607 1738 1637 2598 3610 3874 3641 3577 3976 Cargo 413.786 394.506 379.182 378.965 599.275 812.126 962.758 888.625 842.452 957.319 (thousand)