Free resolution by Groebner basis

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I am studying approaches of Groebner basis in Homological and commutative algebra.

I am so confused how can I find the minimal resolution for the below ideal $$I=\langle yz-xw,y^3-x^2z,xz^2-y^2w,z^3-yw^2 \rangle$$

I already find the $s_{ij}$ but could not undrestand what should I do for the resolution.