Which terms could be used as the first terrn of the expression below to create a polynomial written in standard form? Select five options.
_+ 8r^2s^4 - 3r^3s^3

1. 5s^7/6

2. s^5

3. 3r^4s^5

4. -r^4s^6

5. -6rs^5

6. 4r/s^6

PLS HELP ME

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