b) Show the Huffman code of the string "cbbcbaeda". (5%) 0.15 0.12

10. Design a function that calculates the greatest common divisor (GCD) of two positive integers. Use a main function to call this function. The main function needs to ask the user to input the two integers repeatedly and display the calculation resuit until the user responses to end the program. You may use any computer programming language for this problem. (10%)