how the fork$()$ command and wait$()$ command produce a child process in the following code: int main$($int argc, char $**$argv$)\backslash \{$ printf$("--$beginning of program

$")$; int counter $\backslash (=0\backslash )$; int second; pid$\_$t pid $=$ fork$()$; if $($pid $==0)\backslash \{$ int max$\_$c $=$ atoi$($argv$[1])$; int i$,$x; for $($i $\backslash (=0\backslash )$; i i$)\backslash \{$ printf$("$child process: counter$=$sd

$",++$counter$)$; for $(\backslash ($ x$=0\backslash )$; $\backslash ($ x$<mi>\backslash </mi>$max $\backslash \_$c ; x$++\backslash ))$ ; $\backslash \}\backslash \}$ else if $($pid $>0)\backslash \{$ int j$,$ x$,$ status; int max$\_$p $=$ atoi$($argv$[2])$; pid $=$ wait$(\backslash$&status$)$; for $\backslash (($j$=0$ ; j$<mn>5</mn>$ ;$++$j$)\backslash )\backslash \{$ printf$("$parent process: counter$=$sd

$",++$counter$)$; for $($x$=0$; $\backslash ($ x$<mtext></mtext><mi>\backslash </mi><mi>)</mi>$ max$\_$p; $\backslash ($ x$++\backslash ))$ ; $\backslash \}\backslash \}$ else $\backslash \{//$ fork failed printf$("$fork$()$ failed!

$")$; return $1$; $\backslash \}$ printf$("--$end of program$--$

$")$; return $0$; $\backslash \}$