Let f(x) be a continuous and differentiable function, and consider the following table. You may assume that this table takes into account all x such that f''(x)=0 or f''(x) is undefined.\table[[f''(x),4,0,-12,-6,0,2,Undefined,-1,0,-3],[x,-20,-15,-10,-5,-1,0,2,3,5,9]]Give all intervals of x such that f'(x) only decreases. Select all that apply.(-,10)(-,-15)(2,5)(3,)(5,)(-15,-1)(-5,0)(-1,2)