Write a $($helper$)$ function that takes in two lists of strings that represent coordinates and calculates $($and returns$)$ the Euclidean distance $($see the formula below$)$ between two given points. Notice that the parameter list is different from the original question. You do not need to round. For doctest purposes, you may round the returned result, see the last doctest for example. d $=($x$1-$x$2)2+($y$1-$y$2)2$ def helper$\_$distance$($coord$1,$ coord$2)$: $""">>>$ helper$\_$distance$([\text{'}1\text{'},\text{'}2\text{'}],[\text{'}4\text{'},\text{'}6\text{'}])5\mathrm{.}0>>>$ round$($helper$\_$distance$([\text{'}3\text{'},\text{'}2\text{'}],[\text{'}40\text{'},\text{'}6\text{'}]),3)37\mathrm{.}216"""$