Problem: Write a method that will sum all digits of a number and replace the number with its digit sum. Data: A list containing 0 or more values. The list will not point at null. All numbers will be positive.

Output: All numbers will be replaced by their digit sum.

Help: The method for this problem does not return nor print anything. Yoiu must change the values in the list that was passed in.

Starting List
1, 212, 333, 49
99, 453
213

Ending List
1, 5, 9, 13
18, 12
6

I need this in java with arraylists.

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

What is always true when two whole numbers are subtracted?