See image, In C programming.

make file prrovided:

CC$=$gcc

CFLAGS$+=-$Wall $-$g

OBJECTS$=$

all: Exercise$11\_4$a$.$c Exercise$11\_4$b$.$c

$$($CC$)$ $$($CFLAGS$)$ Exercise$11\_4$a$.$c $-$o Exercise$11\_4$a $-$lpthread

$$($CC$)$ $$($CFLAGS$)$ Exercise$11\_4$b$.$c $-$o Exercise$11\_4$b $-$lpthread

clean:

rm $-$f $*$~

rm $-$f $*.$o

rm $-$f Exercise$11\_4$a

rm $-$f Exercise$11\_4$b

run:

$./$Exercise$11\_4$a&

$./$Exercise$11\_4$b&

kill:

killall $-$q Exercise$11\_4$a

killall $-$q Exercise$11\_4$b