3. if x refers to an array of int values with three elements, which statement assigns the value 12 to the last element in the array? a} x [3] = 12; b} x. set (3) = 12; c} x [2] = 12; d} x. set (3, 12) ; 4. if x refers to an array of int values, which of the following will display all of the values in the array? a) for (int x, y) { system. out. println (y); } b) for (int y, x) { system. out. println (y) ; } c) for (int x : y) { system. out. println (y) ; } d) for (int y : x) { system. out. println (y) ; } 5. which of th following statements contains incorrect syntax? a) int x = {1, 2, 3, 5, 10} ; b) boolean [ ] b = {true, true, false} ; c) double [ ] d ; d) string [ ] str = { "abc", "xyz" } ;

(java)3. the answer is  (c): x[2] = 12; if x is an array with three elements, the first element has index 0. the second index has index 1. the third and final element has index 2.4. the answer is (d) for (int y : x) { system.out.println (y) ; }this is an example of syntax  of a "for-each loop."for each element in the integer array x, use y to indicate the current element to do some code with it.the other choice, (c) for (int x : y) { system.out.println (y) ; }. in a for-each loop, the variable to the right of the colon is the array variable; the one to the left is the control variable.choices (a) and (b) have invalid syntax.5. the answer is (a)  int x = {1, 2, 3, 5, 10}; you need to indicate that it is an array using []. without using [], you are trying to assign an array to an integer. you need to use int[] to indicate integer array.so choice (a) has incorrect syntax.