Which code statement below correctly persists an objects in local Storage ?

Refer to the following array:
Let arr1 = [ 1, 2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not a reference to arr1?

Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

Refer to the code below
let inArray = [[1,2],[3,4,5]];
which two statements results in the array [1,2,3,4,5]?
choose 2 answer

A developer has code that calculates a restaurant bill, but generates incorrect answers while testing the code.

Which option allows the developer to step into each function execution within calculateBill?