
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
The construction of Taiyuan Metro Line 1, which runs from West Mountain Mining Bureau Station in Wanbolin District to Wusu Airport Station in Xiaodian District, follows a northwest-southeast direction. The first phase of the project is 28.9 kilometers long with a total of 24 stations. It officially started construction on December 30, 2019, and is expected to be in trial operation by the end of 2024. The symbolic color of the line is Dream Blue. Team A is responsible for a 2400-meter tunnel excavation project. After working according to the original plan for 6 days, the team increased its work efficiency by 25% and continued to work for 8 more days, completing 2/3 of the project.

$(1)$ Find out how many meters of tunnel were originally planned to be excavated each day.

$(2)$ In order to speed up the construction progress, Team B also participated in the project and requested to complete the remaining work in collaboration with Team A within 4 days. Find out the minimum number of meters of tunnel that Team B must excavate each day.

Present the answer in LaTex format: \boxed{Your answer}
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