Who knows: what is the inflection point of the curve y = (1-x) ^ 3?

Who knows: what is the inflection point of the curve y = (1-x) ^ 3?

y'=3(1-x)²*(1-x)'=-3(1-x)²
y''=-3*2(1-x)*(1-x)'
=6(1-x)=0
x=1
And X0
x>1,y''