(1 point) A line is parameterized by x=4+4t and y=3+4t. (a) Which of the following points are on the section of the line obtained by restricting t to nonnegative numbers (for each, enter Y if the point is on the section, and N if not)? (−4,−5) : (8,7) : (16,15) : Then, give one more point that is on the section of the line obtained by this restriction: (b) What are the endpoints of the line segment obtained by restricting t to −1≤t≤1? left endpoint : right endpoint : (c) How should t be restricted to give the part of the line below the x-axis (give your answer as an interval for t, for example, (3,8) or [-2,Inf))? t must be in