please solve fast

Depending on the following Snapshot of a bash terminal, What is the output of the last command? ranas-mbp.~ rana$ cat | wc & of [1] 1888 ag ranas-mbp:~ rana$ ps -f UID PID PPID C STIME TTY TIME CMD 204 1880 1881 0 2:58PM ttys000 0:00.04 -bash 204 1887 1880 0 3:09PM ttys000 0:00.01 cat 204 1888 1880 0 3:09PM ttys000 0:00.01 WC ranas-mbprana$ echo $$ 1880 0204 1881 1888