The polling program below does a periodic output compare every 1014 TCNT ticks. Timer channel 7 is set up for output compare. Each time there is a valid compare, the program resets the timer channel to enable another output compare. Fill in each blank. The polling program below does a periodic output compare every 1014 TCNT ticks. Timer channel 7 is set up for output compare. Each time there is a valid compare, the program resets the timer channel to enable another output compare. Fill in each blank