Computer programming

$-$What will the following code produce?

numbers $=[1,2,3,4,5]$

$m{y}_l$ist$1=$ numbers $[1$:$3]$

$m{y}_l$ist $2=$ numbers $[1$:$]$

$m{y}_1$ist $3=$ numbers $[$:$1]$

$m{y}_l$ist $4=$ numbers $[$:$]$

$m{y}_l$ist $=$ numbers $[-3$:$]$