Creation of accumulators
An accumulator is a procedure that is called repeatedly with a single numeric argument and accumulates its arguments into a sum. Each time it is called, it returns the currently accumulated sum. Write a procedure
that generates accumulators, each maintaining an independent sum. The input to
should specify the initial value of the sum, for example:
(define A (make-accumulator 5)) (A 10) 15 (A 10) 25
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