A. 5 Write functions of the following MSDOS commands. a. C:\>DIR *.doc/p
b. D:\> Type class8.txt
c. D:\software > copy *.com E:\program
d. F:\> MD Mydir
E: > Erase file 1
f. D:\> Format A:
g. C:\> Edit File2
h. C:\DOS > VOL

Write a program that defines symbolic names for several string literals (chars between quotes). * use each symbolic name in a variable definition. * use of symbolic to compose the assembly code instruction set can perform vara = (vara - varb) + (varc - vard); ensure that variable is in unsigned integer data type. * you should also further enhance your symbolic logic block to to perform expression by introducing addition substitution rule. vara = (vara+varb) - (varc+vard). required: debug the disassembly code and note down the address and memory information.