please use Matlab, please show all steps

Question 4 (15\%) 1. (5\%) Write a MATLAB function to evaluate the following plecewise function: t(y)=200200+0.1(y10,000)1,200+0.15(y20,000)5,700+0.25(y50,000)whenyisbelow10,000whenyisbetween10,000and20,000whenyisbetween20,000and50,000whenyisabove50,000 2. (5\%) Evaluate the function at the following yinputs to confirm the corresponding touputs: 1. y=5,000=200 2. y=17,000=900 3. y=25,000 A, 950 4. y=75,000 =11,950 TIP: You can stant the script with a request for input from the user (using input), to quickly test your code for various cases. 3. (5\%) Explain why the following lifblock would nos be a correct eolution to this exerciee: 1fy50000 is t=5700+0.25(y50000)