Diagram of a weather instrument below and answer q

The diagram shows a U-shaped thermometer containing alcohol and mercury, with two metal indices. This is a Six's maximum-minimum thermometer.

The minimum temperature is indicated by the bottom of the metal index on the left (alcohol) side. The scale on the left increases downwards.
The index is at $22^\circ\text{C}$ (two divisions above $20^\circ\text{C}$).

The maximum temperature is indicated by the bottom of the metal index on the right (mercury) side. The scale on the right increases upwards.
The index is at $27^\circ\text{C}$ (two divisions above $25^\circ\text{C}$).

The current temperature is indicated by the level of the mercury column. Both sides of the mercury column should show the same current temperature.
The mercury level on both the left and right sides is at $20^\circ\text{C}$.

• Name of the instrument: Six's maximum-minimum thermometer
• Minimum temperature: $\boxed{\text{22}^\circ\text{C}}$
• Maximum temperature: $\boxed{\text{27}^\circ\text{C}}$
• Current temperature (W): $\boxed{\text{20}^\circ\text{C}}$