**Python**

1. Write a function called cumulative_sum() that takes a list of numbers and returns a list of the cumulative sums of those numbers. That means that that 2nd number in the returned list should be the sum of the first 2 numbers in the original list, the 3rd number should be the sum of the first 3 numbers in the original list, etc. For example, cumulative_sum([2,3,10,200]) should return[2,5,15,215].*

Hint: There's no need to use sum() for this problem, and it will probably only make things more confusing if you do.

2. Write a function called has_duplicates() that takes a list and returns True if any two items in the list are equal. So for example, has_duplicates([1,7,3,7,4]) should return True andhas_duplicates(["one","ONE","One"]) should return False.*

3. Write a function called remove_duplicates() that takes a list and removes any extra occurrences of values that appear multiple times in the list. I don't care what order the values in the new list have. So for example, if you have the definition L1 = ["a", "b", "a", "c", "c", "c"] and you run remove_duplicates(L1), then depending on how you implement this function, L1 could end up as ["a", "b", "c"], or as ["b", "a", "c"]. Either is acceptable.