Write a method that returns the sum of all the entries in a multiplication table from 1*1 up to and including x*y. For example, if x=3 and y=2, return 18 since 1*1+1*2+1*3+2*1+2*2+2*3=18. If x=2 and y=2, return 9 since 1*1+1*2+2*1+2*2=9. It would help you to understand this problem if you wrote a partial multiplication table out on paper! Then look at the examples explained above, and the results of the test data. That should help! Note that x and y must both be positive, but they can be bigger than 10. However, they WILL be small enough that the total will not be too big to be stored as an integer.