Write a user$-$defined function that, when passed a list of lists as argument,merges the lists into one single continuous list, sorts it$,$ and returns it to the calling code.

It is necessary that your function perform correctly, no matter how many lists are contained in the list of lists, and no matter what the length of the lists.

Your code should work equally well for both of these lists:

groceries $=[[\text{'}$apple$\text{'},$ 'banana','cherry'$],$

$[\text{'}$potatoes$\text{'},$ 'beans', 'broccoli'$],$

$[\text{'}$hamburger$\text{'},$ 'chicken', 'steak'$],$

$[\text{'}$salmon$\text{'},$ 'snapper', 'tuna'$]]$

tools $=[[\text{'}$chisel$\text{'},$ 'hammer' 'saw'$],$

$[\text{'}$screwdriver$\text{'},$ 'wrench'$],$

$[\text{'}$funnel$\text{'},$ 'crowbar', 'pliers', 'ratchet'$]]$