What is the output of the following code:

let prom $=$ new promise $(($resolve$,$ reject$)$

setrimeout

resolve $(4)$

$3,4000$

$\})$

prom. finally

console. $log(p)$;

$\})$

prom. then

console. $log(p)$;

f$).($err$)=>\{$

console. $log(err)$;

$\})$