Given the following monitor as shown below: The methods add and sub are called in the following sequence:

func	1	2	3	4	5	6
call	m.sub();	m.sub ();	m.sub ();	m.add();	m.sub();	m.add();

Monitor m()

{

int val = 1, num = 1, buff = 2;

condition ad, sb;

add()

{

val += 2; //line 1

if(num == buff)

ad.wait(); //line 2

val--; //line 3

num++; //line 4

sb.signal(); //line 5

}

sub()

{

val--; //line 6

if (num == 0)

sb.wait(); //line 7

val += 2; //line 8

num--; //line 9

ad.signal(); //line 10

}

}

func

line #

int val

int num

Fill in the chart to show the exact SEQUENCE of executing the six function calls showing the variable values after executing each line of code.