spent z function alled peri_sum that computes the sun of the deats is that are on the perimeter of In other words, it des thesents t N in the first and last ro 28 cm. Vote that Destinasion of is a least 2, but you do not reed to check this. Hint: Test on the following values: (2 9 8 4 1 22 18,3 2 3 15 7 6 12:13 13 9 41 1 14,13 47 155 10)