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2. Write the definition of the ulong function IndexOf ValueBefore() whose header is template ulong IndexOf ValueBefore(const Arrayk data,const T& value,const Tk delimit) It returns the index of the first element of data whose value equals wlue before the first element of dato whose value equals delimit. If data is empty, delimit is not contained in data, or no instance of volue is found before the first instance of delimit, the function returns to size of data. For instance, if data = (1,3,4.2.1.4,2,3,1,3,4), value = 4 and dem = 2, the function will return 2