I am trying to find the value of Vgs for MOSFET Q7 or the drain/source current of MOSFET q7

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Joined Oct 19, 2022
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I am trying to calculate the value of R2 to achieve a DC voltage of 7V at vout, and I have derived an equation where R2 = 7V/Id7, however I am unsure how to find Id7 without knowing Vgs for Q7. (also Id7 = Is7).

Or am I going about this completely the wrong way and is there another way to solve R2?

Any help would be greatly appreciated.