Compute equilbrium points and stable-unstable or semi stable

Question

Graph f(y)= -y*(y+1)^2

i) Compute equilbrium points and then find if stable, unstable or semistabile

ii) What will final value of y(t) if system has initial conditions y(0)=1

iii) Determine final value of y(t) if system has initial conditions y(0)= -1