need help to solve please see attached

Find the relative extrema, if any, of the function. Use the Second Derivative Test if applicable. (If an answer does not exist, enter DNE.) f(t) = 5t + 3 relative maximum (t, f ) = relative minimum ( t , f ) = Flight of a Rocket The altitude (in feet) of a rocket t s into flight is given by s = f(t) = -ts + 66+2 + 470t + 6 (t20). Find the point of inflection of the function f. (t, s ) = What is the maximum velocity (in ft/s) attained by the rocket? ft/s