Part $1.$ w$\_$sum$()$

Now, write a function called w$\_$sum that takes as input a list of floats vals: list $[$float$],$ and returns the sum of all elements. Loop through the list using a while loop.

For example, $w_{-}$sum$(($:$[1\mathrm{.}1,0\mathrm{.}9,1\mathrm{.}0]\}$ should compute $1\mathrm{.}1+0\mathrm{.}9+1\mathrm{.}0$ and return the simplified value $3\mathrm{.}0.$

The sum of an empty list $w_{-}$sum $([])$ should retum $0\mathrm{.}0.$

Part $2.$f$\_$sum$()$

Now, write a function called sum that performs the same way as $w_{-}$sum, calculating the sum of all elements in vals but uses a for $...$ in $...$ loop. $($Do NOT use the range keyword for this partl$)$

Part $3.$f$\_$range$\_$sum$()$

Finally, write a function called range$\_$sum that performs the same way as the two previous functions, calculating the sum of all elements in vals but uses a for $...$ in range$(...)$ loop.