Write java methods to do these tasks: a. Move even elements to the front, if not then preserving the order of the elements. Return true if all elements in array are identical. b.Remove the middle...

Write java methods to do these tasks:

a. Move even elements to the front, if not then preserving the order of the elements. Return true if all elements in array are identical.

b.Remove the middle element if the array length is odd, or the middle two elements if the length is even.

**Find the mean of the values in an array

**Find the second-largest element in the array.

**Find the median value of the values in an array