In a particular​ country, the average adult is spending even more time on a mobile device than watching television. From 2014 to ​2021, the function y=-9.11x+280x can be used to estimate the average number of minutes per day that an adult spends watching​ television, and the function y=12.34x + 169.9 can be used to estimate the average number of minutes per day that an adult spends on a mobile device. For both​ functions, x is the number of years after 2014. a. Based on this​ information, determine the year in which the time spent watching television is the same as the time spent on a mobile device. b. Use these functions to predict how much time the average adult spends per day watching television and on a mobile device for the year 2021..