python

Write a function first_neg that takes a (possibly empty) list of numbers as input parameter, finds the first occurrence of a negative number, and returns the index (i.e. the position in the list) of that number. If the list contains no negative numbers or it is empty, the program should return None. Use WHILE LOOP (AND NOT FOR LOOP) and your while loop should stop looping once the first negative number is found. Test your function with at least the examples below >>> first_neg ([2, 3, -1, 4, -2]) 2 >>> first_neg ( [2, 3, 1, 4, 2]) >>> first_neg ( [])