2.Explain how this sentence In a bucket brigade, each person hands a result to the next. is related to functional programming (5 points)

3. Draw the plumbing diagram for (- (+ 5 8) (+ 2 4)) (5 points)

4. Translate the arithmetic expressions (3+4)5 and 3+(45) into Scheme expressions, and into plumbing diagrams (5 points)

5. Evaluate each of the following expressions using the result replacement technique: (5 points) ? (sqrt (+ 6 (* 5 2))) ? (+ (+ (+ 1 2) 3) 4)

6. Fix the error below: (10 points)

a. (define (next x) (x + 1)) b. (define (square) (* x x))