You are given a piece of procedural code that processes a list of integers. Refactor it to use lambda expressions and higher$-$order functions.

fun main$()0$

val numbers $=$ listof$(1,2,3.4,5.6)$

$//$Calculate the square of each number

val squares $=$ mutableListof$()$

for $($number in numbers$)\{$

squares. add $($number $*$ number$)$

$\}$

$//$ Filter even numbers

val evenSquares $=$ mutableListOf$()$

for $($square in squares$)\{$

if $($square $\%2==0)\{$

evenSquares. add $($square$)$

$\}$

$\}$

printin$("$Even squares: SevenSquares"$)$

$\}$

Your Task: Refactor the above code using:

$$ Lambda expressions for calculating squares.

$$ Higher$-$order functions like map and filter.