1. Personal Learning code. Yes or no. Do not explain.

Welcome to drracket, version 5.1.1 [3 M]. language: r5rs; Memory limit: 128 MB.> 9 defune (abs x ).. reference to undefined identifier: 9defune .. reference to undefined identifier: x> (defune (abs x) (cond (> x 0) X) (= x 0) 0) (<x 0) (-X )))).. reference to undefined identifier: defune> (define (abs x) (cond (> x 0) X) (= x 0) 0) (<x 0) (-X) define-values: cannot change constant variable: ABS> (define (_ abs x) (cond (> x 0) X) (= x 0) 0) (<x 0) (-X)> (-Abs 1 ).. reference to undefined identifier:-ABS> (_ Abs 1) 1> (_ ABS-11) 11> (_ ABS 0) 0> (define (_ abs x) (cond (<x 0)-x) (else X)> (_ ABS-4 ).. reference to undefined identifier:-x> (define (_ abs x) (cond (<x 0) (-x) (else X)> (_ ABS-4) 4> (_ ABS 24) 24> (_ ABS 0) 0> (_ ABS-0) 0> (define (___ abs x) (if (<x 0) (-x)> (___ ABS-5) 5> (___ ABS 95) 95> (___ ABS 0) 0> (___ ABS-0) 0> (else ). else: not allowed as an expression in: (else)> (else 4 ). else: not allowed as an expression in: (else 4)> (and 1 3 4) 4> (and 1 0 4) 4> (and 1 # F 4) # F> (and # T # F 4) # F> (and 1 # T 4) 4> (OR 1 # T 4) 1> (or # F # T 4) # T> (or # F 4) 4> (or # F # f) # F> (not # f) # T> (not 23) # F> (not 2) # F> (and (> X 5) (<x 0 )).. reference to undefined identifier: x> (define (a x) (and (> X 5) (<x 0)> (a 3) # F> (a 7) # F> (define (a x) (and (> X 5) (<x 10)> (a 7) # T> 1010> (+ 5 3 4) 12> (-9 1) 8> (/6 2) 3> (+ (* 2 4) (-4 6) 6> (define a 3)> (define B (+ A 1)> (+ a B (* a B) 19> (= a B) # F> (if (and (> B) (<B (* a B) B a) 4> (cond (= a 4) 6) (= B 4) (+ 6 7 )) (else 25) 16> (+ 2 (if (> B a) 6> (* (cond (<a B)) (<a B) (else 1) (+ A 1) 12> (* (cond (> a B) A) (<a B) b) (else 1) (+ A 1) 16> (/(+ 5 4 (-2 (-3 (+ 6 (/4 5 ))))) (* 3 (-6 2) (-2 7)-37/150>; exercise 1.3 (define (lx_1.3 a B c) (-(+ a B C) (cond (<a B) (if (<a c) a C) (<B c) B) (else C)> (lx_1.3 1 2 3) 5> (lx_1.3 11 2 3) 14>; exercise 1.4 (define (A-plus-Abs-B a B) (if (> B 0) +-) a B)> (A-plus-Abs-B 1 2) 3> (A-plus-Abs-B-1 2) 1> (A-plus-Abs-B-1-2) 1> (A-plus-Abs-B 1-2) 3> 11> (1 ).. procedure application: expected procedure, given: 1 (no arguments)> (define (p)> (define (test x y) (if (= x Y) x y)]. read: Illegal use of close square bracket> (define (test x y) (if (= x Y)> (test 0 (p )).. user break>