need help with this asap, thumbs up if you can solve this in a few and thank you in advance!

Java Programming

(10) 1. Develop a method that given an integer n returns the largest prime number ken. public int print for(int 1.2; i--) IFC 11 ) IFA 2): (10) 2. You can approximatel by using the following series: II = 4(1 5+ 1 +++ 21-1 21+1 Develop a method that given an integer i returns i approximation of julie statle double series (at) Booble. for (int 1. in 1) -1/2-1)-(2/2+1}}} return (10) 3. Develop a method arrayStatistics that given an array of fractional numbers a returns an array of fractional numbers b where: broj is the smallest element in a . b[1] is the largest element in a b[2] is the average of the elements in a b[3] is the standard deviation of the elements in a standard deviation of a set of numbers is calculated using the following formula: Where j is the average of the array. (10) 4. Develop a method that given an array of integers returns an array of integers containing the elements of the input argument in reverse order. (10) 4. Develop a method that given an array of integers returns an array of Integers containing the elements of the input argument in reverse order. (10) 5. Write a method that given two 2D arraysa and returns the sum of the two arrays C where: Cu = aj + bij ift the two anays are compatible have the same and columns