The function \(y = \sin(a(x + b))\) is a sine wave with an amplitude of 1. The period of the sine function is given by \(\frac{2\pi}{a}\). From the graph, the period is \(4\pi\), so:

\(\frac{2\pi}{a} = 4\pi\)

Solving for \(a\), we get:

\(a = \frac{1}{2}\)

The phase shift is determined by \(b\). The graph starts at \(x = -\frac{\pi}{3}\), which corresponds to the phase shift. Therefore, \(b = \frac{\pi}{3}\).