Start the program with the clc and clear commands. Write in comment for what these commands are used. 1. For x=3&y=0.2 calculate and assign a variable a) x4 + 3x-3x+9 x+y x+y 2x-y + b) x-y c) e-(x+y) + In(ly - 2x1) 2. The total pressure in a duct is calculate by: Pt= Po (1+9=1 M) 01 for g=1.4, Po= 101.3 kPa, M=0.4 sin(ax) x cos(ax) a a 3. The integral of fx sinax dx : 37 fr x sin (0.6x) dx using the functions of MATLAB then calculate