Write a function that takes a 1d array-type variable x as input parameter (list, tuple, or np. array), counts the number of elements in the array that are less than zero, and returns the number of elements found (n) and the fraction of the data that were less than zero (n / number of values in x). if the input array is empty (i. e., if len(x) is zero), return a value of -1 for each output parameter.

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