Trace the following code by hand, writing what it prints? Do not compile and run it simulate it by hand tracing. The code below is supposed to instantiate an array called t with 500 elements and set the value of each element to 50, but there is are a few errors in the code errors. Rewrite the code to fix the errors. Finish the method below to return a string that is in both a and b if one exists, and null if one does not exist