Which register is used to specify system call number? Enter a register name like zero, not x0. QUESTION 2 What is the system call number for reading an integer from the console? Enter a decimal number. QUESTION 3 When reading an integer from the console, in which register is the integer saved when the system call returns? Enter a register name. QUESTION 4 What is the system call number for printing an integer in hexadecimal? Enter a decimal number. QUESTION 5 What is the keyboard shortcut for backstep? The "Run" menu lists commonly used functions and associated shortcuts