Java programming-Need help with these asap, thank you in advance!

(10) 1. Develop a method that given an integer n returns the largest prime number k 2); k=n; } return k; 2 (10) 2. You can approximate II by using the following series: II = 4(1 1 1 1 --+--- + 3 5 7 1 + 2i-1 1 -) 2i+1 Develop a method that given an integer i returns ith approximation of a public static double series (int n) { double sum=0.8; for (int i = 1; i<>