this is showing only value error in the second line im unable to make it right can anyone help me!

[kriShnanu0425]

fig,ax = plt.subplots(figsize=(12,5))
ax = sns.lineplot(x=n_clusters, y=clusters_inertia, marker='o', ax=ax)
ax.set_title("Elbow method")
ax.set_xlabel("number of clusters")
ax.set_ylabel("clusters inertia")
ax.axvline(5, ls="--", c="red")
ax.axvline(6, ls="--", c="red")
plt.grid()
plt.show()