File 'sequence.txt$\text{'}$ is opened for writing. num$\_$file$\_$obj is assigned with the opened file. Integer first$\_$val is read from input.

Complete the following tasks:

Write 'Sequence: $\text{'}$ to num$\_$file$\_$obj.

Write the values of first$\_$val, first$\_$val $-2,$ and first$\_$val $-4$ to num$\_$file$\_$obj. Separate each value with a comma $(\text{'},\text{'}).$

Write a newline to num$\_$file$\_$obj.

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Note: The challenge activity will read and output file 'sequence.txt$\text{'}.$

num$\_$file$\_$obj $=$ open$(\text{'}$sequence$.$txt$\text{'},\text{'}$w$\text{'})$

first$\_$val $=$ int input $())$

I$\text{'}\text{'}\text{'}$ Your code goes here $\text{'}\text{'}\text{'}$

num$\_$file$\_$obj.close$()$