Write a function Array_high which will receive one parameter as an Array of array of integer values, and it should return an array value indexed by Keys ("highest_val" and "highest_count") with values as the Highest integer value and the highest number of elements in sub arrays.
For example, with the input value {{2,3},{2}, {1,2,3,4},{5,6,2,1,3,10}}, the "highest_val" is 10 and "highest_count" is 6, and the return array should be:
$arr['highest_val']= 10;
$arr['highest_count'] = 6;
