When using cot, what character entered as a command line argument takes input (reads) from Standard Input? QUESTION 2 If you want the most control and information from the return value of getopt, what character should appear at the beginning of the optstring argument? QUESTION 3 Name a library function that can be called from within a C program to ensure getopt performs per the POSIX specification. QUESTION 4 Regarding getopt, what variables, and associated typo (C Declaration Syntax), are declared as a resuit of including tho above library? optagoptindoptoptoptortsintAint0intcint0int.Echar.Fidat