Part 1: Write the fraction that is shaded and the fraction that is unshaded. Part 2: Write <, >, or = to compare the fractions.

Part 1: Write the fraction that is shaded and the fraction that is unshaded.

1. a) Fraction shaded: $\boxed{\frac{2}{8}}$ b) Fraction unshaded: $\boxed{\frac{6}{8}}$

2. a) Fraction shaded: $\boxed{\frac{4}{8}}$ b) Fraction unshaded: $\boxed{\frac{4}{8}}$

3. a) Fraction shaded: $\boxed{\frac{3}{8}}$ b) Fraction unshaded: $\boxed{\frac{5}{8}}$

4. a) Fraction shaded: $\boxed{\frac{2}{8}}$ b) Fraction unshaded: $\boxed{\frac{6}{8}}$

Part 2: Write $<, >,$ or $=$ to compare the fractions below.

a) Compare $\frac{1}{2}$ and $\frac{1}{4}$.
To compare, convert $\frac{1}{2}$ to an equivalent fraction with a denominator of 4:

$$\frac{1}{2} = \frac{1 \times 2}{2 \times 2} = \frac{2}{4}$$

Now compare $\frac{2}{4}$ and $\frac{1}{4}$.

$$\frac{2}{4} > \frac{1}{4}$$

So, $\boxed{\frac{1}{2} > \frac{1}{4}}$

b) Compare $\frac{2}{8}$ and $\frac{1}{4}$.
Simplify $\frac{2}{8}$:

$$\frac{2}{8} = \frac{2 \div 2}{8 \div 2} = \frac{1}{4}$$

Now compare $\frac{1}{4}$ and $\frac{1}{4}$.

$$\frac{1}{4} = \frac{1}{4}$$

So, $\boxed{\frac{2}{8} = \frac{1}{4}}$

c) Compare $\frac{3}{8}$ and $\frac{1}{2}$.
To compare, convert $\frac{1}{2}$ to an equivalent fraction with a denominator of 8:

$$\frac{1}{2} = \frac{1 \times 4}{2 \times 4} = \frac{4}{8}$$

Now compare $\frac{3}{8}$ and $\frac{4}{8}$.

$$\frac{3}{8} < \frac{4}{8}$$

So, $\boxed{\frac{3}{8} < \frac{1}{2}}$

d) Compare $\frac{6}{8}$ and $\frac{3}{4}$.
Simplify $\frac{6}{8}$:

$$\frac{6}{8} = \frac{6 \div 2}{8 \div 2} = \frac{3}{4}$$

Now compare $\frac{3}{4}$ and $\frac{3}{4}$.

$$\frac{3}{4} = \frac{3}{4}$$

So, $\boxed{\frac{6}{8} = \frac{3}{4}}$

e) Compare 1 and $\frac{4}{4}$.
The fraction $\frac{4}{4}$ represents a whole.

$$\frac{4}{4} = 1$$

Now compare 1 and 1.

$$1 = 1$$

So, $\boxed{1 = \frac{4}{4}}$

f) Compare $\frac{4}{8}$ and $\frac{1}{4}$.
Simplify $\frac{4}{8}$:

$$\frac{4}{8} = \frac{4 \div 4}{8 \div 4} = \frac{1}{2}$$

To compare $\frac{1}{2}$ and $\frac{1}{4}$, convert $\frac{1}{2}$ to an equivalent fraction with a denominator of 4:

$$\frac{1}{2} = \frac{1 \times 2}{2 \times 2} = \frac{2}{4}$$

Now compare $\frac{2}{4}$ and $\frac{1}{4}$.

$$\frac{2}{4} > \frac{1}{4}$$

So, $\boxed{\frac{4}{8} > \frac{1}{4}}$