In Question 2, you are required to find the Fourier series of two functions:

1. Function $f(x)$ in the interval $0 \leq x \leq 2\pi$.
2. A piecewise function defined as: \begin{cases} t, & -\pi \leq x < 0 \\ 2\pi, & 0 \leq x \leq 2 \end{cases}$$

To summarize, you need to:

1. Compute the Fourier coefficients for the given functions.
2. Use standard Fourier series methods, such as determining the a₀, aₙ, and bₙ terms.
3. Combine these terms to represent the function as a sum of cosine and sine functions in the series.

Would you like detailed steps for finding the Fourier coefficients or solving the second part?