Assume that the following is a method in class LinkedListExample and class KWLinkedList as explained in the lectures is available for use. What does the following non-member method do? public static void uknownMethod( KWLinkedList list1, E value1, E value2)

{

ListIterator iter = list1.listIterator();

int i;

while (iter. hasNext())

{

if (iter. next().equals(value1))

i = iter. nextIndex();

list1.add(i-1, value2);

}

}

If value1 exists in list1, then it adds value2 before one node from value1 in list1.

If value1 exists in list1, then it adds value2 after one node from value1 in list1.

If value1 exists in list1, then it adds value2 after value1 in list1.

If value1 exists in list1, then it adds value2 before value1 in list1.

Write a new lc-3 trap subroutine (i.e. a subroutine that will be invoked via the trap instruction) that will receive a numeric digit entered at the keyboard (i.e. an ascii character), echo it to the screen, and return in r0 the corresponding numeric value: so if the user types the digit '7', the character '7' will appear on the screen, but the value returned in r0 will be b0000 0000 0000 0111 (#7) you may not use any trap calls in your code - you must implement the "polling" code that interrogates the keyboard status and data registers. ; getnum_tsr ; a subroutine for obtaining a numeric value ; given ascii numeric digit input to keyboard. ; the numeric digit is echoed to the console (e.g. '7' = b0000 0000 0011 0111), ; but the value returned in r0 is the actual numeric value ; corresponding to the digit (e.g. b0000 0000 0000 0111 =