Application Of Derivatives

The curve \(y(x)=a x^{3}+b x^{2}+c x+5\) touches the \(x\)-axis at the point \(\mathrm{P}(-2,0)\) and cuts the \(y\)-axis at the point \(Q\), where \(y^{\prime}\) is equal to 3 . Then the local maximum value of \(y(x)\) is: