4. OPTIONAL bonus question (7 bonus marks): (You need to read the Appendix C "The Hexadecimal Number System and Memory Addressing" and Appendix B "ASCII Character Set and Ansi.sys" from the Q: drive. Don 't worry if you don't know how to do the questions. They will be taught in class. ) a. What is the ASCII code in binary and in decimal for the symbol @? b. What are the ASCII codes in binary and in decimal for Z and z respectively? c. Write down the 1st20 binary numbers starting from 1. d. Write down the 1st20 hexadecimal numbers starting from 1 . e. What is the largest decimal number that can be stored using 8 bits, or 1 byte? (Show steps.) f. Convert 73 decimal to binary. Then convert 73 to hex. (Show steps.) g. What is 10011001 in decimal? In hex? (Show steps.)