An example of a mixed number is $3 \frac{1}{4}$ because it is composed of a whole number, $3$, and a fraction, $\frac{1}{4}$. An example of a fraction greater than one is $\frac{13}{4}$ because the numerator, which represents the number of equal pieces, is larger than the denominator, which represents the number of pieces in one whole, so its value is greater than one.

For part (a), try drawing a diagram to help visualize how many eighths are in four. Also, if you find how many eighths there are in 1, you can use multiplication to find the solution.

For part (d), you can find the mixed number by treating the fraction as a division problem. It is easier than it might seem.