6. Find dy where y is defined implicitly by the equation a' + 2y = 1. 7. A ten foot ladder is sliding down a wall and the floor. The top of the ladder is sliding down at a rate of 2 ft/sec. How fast is the other end of the ladder moving when it is 5 feet from the wall? 8. Evaluate the given limit: Inc a) lim b) lim (re ?) c) lima 3 0+ 9. Find the absolute maximum value and the absolute minimum value of the function /(a) = p - 9r' + 24c over the interval / = [0, 3). Also, state where these extrema occur