22 Evaluate the integral: I'VE + 81 (A) Which trig substitution is correct for this integral? Or = - 22 sec(@) Or - 9tan(0) Or - 81 sec(0) Or - 81 tan(0) Or = 81 sin(0) Or = 9 sin(0) (B) Which integral do you obtain after substituting for z and simplifying? Note: to enter 0, type the word theta. sec ( 0) x | do tan (0 (C) What is the value of the above integral in terms of 0? 22 81 sin (0) C