(1 point) The function f(t) is given by f(t) = 15 - 4514 on -co

(1 point) The function f(t) is given by f(t) = t5 45t4 on oo < t 45. Find the coordinates of all extrema of f. f (t) has relative maxima at f (t) has relative minima at f(t) has absolute maxima at f (t) has absolute minima at (Enter each extremum as an ordered pair, e.g., (2,3). If there is more than one extremum of a given type, enter a comma-separated list of ordered pairs. If there are no extrema of a given type, enter "none".)