_ 1:3 4:3 3. For the function given by the equation y _6X +3X a}Find the coordinates of the intercepts b} Find the intervals on which this function is increasing c} Find the intervals on which this function is decreasing d} Find the intervals on which this function is concave up e} Find the intervals on which this function is concave down f} Find the coordinates of the extrema g} Find the coordinates of the points of inflections h} Write the domain and the range of this function i} Sketch an approximate graph of this function using geogebra