3. mydetecttop(f, a,t) which takes three inputs: [50 pts] f: A function handle. a: A real number. t: A real number. Note: You may assume that f is increasing at x = a but there is a cutoff x = b > a after which f starts decreasing. Does: Uses a while loop to check f(x) for x = a, x = a + 3t, x = a + 6t, ... until a value is smaller than the previous value. Returns: The x value (not the f(x) value!) for which this happens