Please code in MATLAB and explain how it works so that way I can do this with different numbers. Thank you.

This assignment deals with determining the round-off error in a single-variable function due to an error in the independent variable.

A value x=0.2 has an error of x=0.0003. If y=x4+9.2x3+71, what is y ? A value x=3.8 has an error of x=0.0500. If y=x31.6x2+0.23, what is y ? A value x=3.5 has an error of x=0.0300. If y=xcos(1.1x)8.7x+11, what is y