33. The greatest common divisor is the largest positive integer that divides the numbers without a remainder. For example, the greatest common divisor of 8 and 12 is 4. Use the MATLAB Help Window to find a MATLAB built-in function that determines the greatest common divisor of two numbers. Then use the function to show that the greatest common divisor of:

(a) 91 and 147 is 7.

(b) 555 and 962 is 37.