The MAT file called Postlab2Data. mat contains data pertaining to three metallic samples from a corrosion experiment. These samples are represented as structure-class MATLAB variables: sample1
sample2
sample3

sample1, sample2, and sample3 each have four fields, specified by the names:

Alloy
Mass
Media
Thickness

Write a MATLAB script that completes the following:

a. Loads the variables contained in the Postlab2Data. mat file into the worspace.
b. Defines a new variable called copperMass that contains the mass of sample2.
c. Defies a new variable called thkDiff that contains the absolute-value of the difference in thickness between sample1 and sample3.
d. Changes the media of sample2 to 'Saline Solution'
e. Creates a new variable called sample4 that has the following attributes: Alloy ='Tl-6Al-4V'; Mass= 1.5524; Media=None'; Thickness =1.72;