1.44: Normal to a logarithmic curve and triangle area

Find the equation of the normal to the curve $y = \dfrac{1}{2}\ln(3x + 2)$ at the point $P$ where $x = -\dfrac{1}{3}$.

The normal to the curve at the point $P$ intersects the $y$-axis at the point $Q$. The curve $y = \dfrac{1}{2}\ln(3x + 2)$ intersects the $y$-axis at the point $R$. Find the area of the triangle $PQR$.