What does the following code print?

$1)$

def modify$($numList$)$: numList$[1]=99$ list $=[10,20,30]$ modify$($list$)$ print$($list$)$

$2)$

def modify$($string$)$: string$[0]=\text{'}$C$\text{'}$ string $=$ 'Hello' modify$($string$)$ print$($string$)$

$3)$

def modify$($string$)$: string $=$ 'Cello' string $=$ 'Hello' modify$($string$)$ print$($string$)$