Calculate the inclination of the line joining A(3, -1) and B(-2, -3). Calculate the inclination of the line joining F(4, 5) and G(4, 9). Calculate the gradient of a line with inclination 135 degrees.

$$m = \frac{y_2 - y_1}{x_2 - x_1}$$ $$m = \frac{-3 - (-1)}{-2 - 3}$$ $$m = \frac{-3 + 1}{-5}$$ $$m = \frac{-2}{-5}$$ $$m = \frac{2}{5}$$

$$\tan \theta = m$$ $$\tan \theta = \frac{2}{5}$$ $$\theta = \arctan\left(\frac{2}{5}\right)$$ $$\theta \approx 21.8014^\circ$$

Rounded to two decimal places:

$$\theta \approx 21.80^\circ$$

The inclination is $\boxed{\text{21.80}^\circ}$.

1.c) Calculate the inclination of the line joining F(4, 5) and G(4, 9).

$$m = \frac{y_2 - y_1}{x_2 - x_1}$$ $$m = \frac{9 - 5}{4 - 4}$$ $$m = \frac{4}{0}$$

The gradient is undefined.

An undefined gradient indicates a vertical line.
The inclination of a vertical line is $90^\circ$.
The inclination is $\boxed{\text{90}^\circ}$.

2.a) Calculate the gradient of a line with inclination $135^\circ$.

$$m = \tan(135^\circ)$$ $$m = -1$$

The gradient is $\boxed{-1}$.

2.c) Calculate the gradient of a line with inclination $60^\circ$.

$$m = \tan(60^\circ)$$ $$m = \sqrt{3}$$

The gradient is $\boxed{\sqrt{3}}$.