The values of \( x(t) \) and \( y(t) \) at selected points are:
- At \( t = 2 \): \( x(2) = 3.5 \), \( y(2) = 1 \)
- At \( t = 3 \): \( x(3) \approx 3.0 \), \( y(3) = 2 \)
- At \( t = 4 \): \( x(4) = 2.75 \), \( y(4) = 3 \)
Thus, the final boxed answers are:
\[
\boxed{x(2) = 3.5, \quad y(2) = 1}
\]
\[
\boxed{x(3) \approx 3.0, \quad y(3) = 2}
\]
\[
\boxed{x(4) = 2.75, \quad y(4) = 3}
\]