Train a hardware-efficient ansatz to GHZ

The circuit structure is locked: you may only change the values of the $12$ trainable parameters. The parameter named $\texttt{t\_}l\texttt{\_}q\texttt{\_}k$ is the angle $\theta_{l,q,k}$ of layer $l\in\{0,1\}$ on qubit $q\in\{0,1,2\}$, with $k=0$ for the $R_Y$ rotation and $k=1$ for the $R_Z$ rotation. Layer $l$ is $W_l(\theta)=\mathrm{CNOT}(1,2)\,\mathrm{CNOT}(0,1)\prod_{q=0}^{2}R_Z(\theta_{l,q,1})\,R_Y(\theta_{l,q,0}),$ so in time order: $R_Y$ then $R_Z$ on each qubit, then $\mathrm{CNOT}(0,1)$, then $\mathrm{CNOT}(1,2)$. The circuit is $W_1(\theta)W_0(\theta)$ applied to $\lvert000\rangle$, with $R_P(\theta)=e^{-i\theta P/2}$ and qubit $0$ the leftmost (most significant) bit.

Set the parameters so that the output state is $\lvert\mathrm{GHZ}\rangle=\frac1{\sqrt2}\big(\lvert000\rangle+\lvert111\rangle\big).$ The grader requires the fidelity $F=\lvert\langle\mathrm{GHZ}\vert\psi(\theta)\rangle\rvert^2\ge0.99$. A single non-zero angle suffices.