Need help writing this code in Scheme using DrRacket

Recall from class the definition of number-sum, which computes the sum of the first n numbers: (define (number- sum n) (if (n 0) (a) Adapt the function to one named (even-sum n) that computes the sum of the first n even numbers (remember that the first even numbe is 0). (So (ev en-sum 4) should return 12, the sum of the first 4 even numbers: 0+2+4+6.) like, and does that make sense? from a to b, so (sun-from-to 3 5) should evaluate to 12. If a is greater that b, it should (b) Evaluate your function at 1 2, 3, 4, 5, 6, and 7. What does this sequence of numbers look (c) Adapt the function into (sum-from-to a b) that it computes the sum of the all integers evaluate to 0