The Airtime scheduling function is mainly used to schedule the wireless channel occupation time of each user to ensure that each user occupies the wireless channel relatively fairly. As shown in the…

The Airtime scheduling function is mainly used to schedule the wireless channel occupation time of each user to ensure that each user occupies the wireless channel relatively fairly. As shown in the figure below, there are four users User1, User2, Uuser3 and USser4 in the transmission queue, and the four users currently occupy the channel for 5, 4, 6 and 7 times respectively. When the Airtime scheduling function is turned on, which user will be prioritized next?