Programming Exercise (50 points) In this assignment, you will be learning Scheme through the use of Dr. Racket. We would like to start with some basic concepts, trying to under prefix notation and the use procedure in Scheme. You will also implement nested procedures and recursive procedures. You may only use the procedures shown in the text and slides not any of the additional library procedures in Scheme. 1. Using Dr. Racket to compute the following expressions. [5 points] (1) 3 5 7 (2) 2 (8 5 4) -25 (3) 10 (3 5 (2 (0 5) (4) 5 4 (10 10) (5 8 10 2 (5) 3 5)" (6 4)) 2) 2) 5) 3) 2 10 +(5 4)) 2 4 5) 2. (define) each value 1.5 above to its' English text and then change the expression using the defined names. 15 points] For example, the values in 1.1 should be replaced with names three, five, and seven, and the correct corresponding expression is (eight two ten) 3. Define a procedure "Subtract" that takes parameters and returns the difference of [5 points] them You can use the built-in to define your Subtract procedure (Subtract 120 50) 70