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5. (10 points) For what values of b is g(I) = Jx+1, ifx -2 bx + 6, if x > 2. continuous at every x? 6. (10 points) On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip, the average speed was y miles per hour. The average speed for the round trip was 50 miles per hour. The average speed is given by 25x y x- 25 Find the limit of y as x approaches 25 from the right and interpret its meaning