Note: the answers to the following questions should be typed in the block of comments in the assignemnt7.java file. make sure they're commented out (green). type them neatly and make them easy to read for the graders. you will not receive any partial points for an incorrect answer. 1. which of the following are valid array declarations? if it is not valid write a valid statement. (2 pts) a. char [26] chararraynew char [26] b. int [10] words = new int[]; c. char[] charar ray= "computer science"; d. double [ ] nums {3.5, 35.1, 32.0}; 2. write the output of the following code: (2 pts) public class hw7 public static void main(stringl] args) intx-new int[10] for (int i-0 i < x. length; i++) system. out. println (x[i]) 3. write a method that takes an array of strings as a parameter and the number of elements currently stored in the array, and returns a single string that is the concatenation of all strings in the array. (3pts)