What does the following line of code mean?:

system("kill -9 $(ps -l|grep -w Z|tr -s ' '|cut -d ' ' -f 5)");

Please provide another way of writing this line.

Full code for reference:

#include #include #include #include int main () { system("./Assignment2a &"); system("ps -l"); sleep(3); system("kill -9 $(ps -l|grep -w Z|tr -s ' '|cut -d ' ' -f 5)"); sleep(7); printf(" updated list of processes with their states "); system("ps -l"); return(0); }