
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
A certain scenic area has two attractions that require tickets for visiting. The three ticket purchase options presented at the ticket office are as follows:  
Option 1: Visit attraction A only, $30$ yuan per person;  
Option 2: Visit attraction B only, $50$ yuan per person;  
Option 3: Combined ticket for attractions A and B, $70$ yuan per person.  
It is predicted that in April, $20,000$ people will choose option 1, $10,000$ people will choose option 2, and $10,000$ people will choose option 3. In order to increase revenue, the ticket prices are adjusted. It is found that when the prices of options 1 and 2 remain unchanged, for every $1$ yuan decrease in the price of the combined ticket (option 3), $400$ people who originally planned to buy tickets for attraction A only and $600$ people who originally planned to buy tickets for attraction B only will switch to buying the combined ticket.  
$(1)$ If the price of the combined ticket decreases by $5$ yuan, the number of people buying tickets for option 1 will be _______ thousand people, the number of people buying tickets for option 2 will be _______ thousand people, the number of people buying tickets for option 3 will be _______ thousand people; and calculate how many tens of thousands of yuan the total ticket revenue will be?  
$(2)$ When the price of the combined ticket decreases by $x$ (yuan), find the functional relationship between the total ticket revenue $w$ (in tens of thousands of yuan) in April and $x$ (yuan), and determine at what price the combined ticket should be to maximize the total ticket revenue in April. What is the maximum value in tens of thousands of yuan?

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