Is it obstructive, restrictive or mixed function? Elaborate

Based on the spirometry results:

1. FEV1/FVC Ratio: The measured FEV1/FVC ratio is $67\%$, which is below the Lower Limit of Normal (LLN) of $70\%$. A reduced FEV1/FVC ratio is the primary indicator of an obstructive ventilatory defect.
2. FVC (Forced Vital Capacity): The measured FVC is $1.99 \text{ L}$, which is below the LLN of $2.23 \text{ L}$. A reduced FVC suggests a restrictive ventilatory defect.

Since both the FEV1/FVC ratio is reduced (indicating obstruction) and the FVC is reduced (indicating restriction), the pattern is a mixed ventilatory defect.