These all involve writing Matlab commands to do each of the following parts.
Assuming the values from aaa.txt have been loaded into the array Bob:
a.) determine the number values in Bob that are between 0 and 4 (not inclusive)
b.) construct a new matrix D by subtracting 1 from those entries in Bob that are strictly less than the value that is 3 times the minimum entry in Bob, leaving the other entries unchanged.
c.) determine a new matrix B containing the result of rounding each of the entries in Bob to an integer; then construct a new matrix C that is the same size as B in which all the numbers greater than zero are replaced by 9 and the others are replaced by 6.