Added Qullen Plot

src/lib/fetModel.typ

@@ -1,4 +1,6 @@
 #import "@preview/zap:0.5.0"
+#import "@preview/cetz-plot:0.1.3"
+
 
 #set page(width: auto, height: auto)
 
@@ -240,3 +242,49 @@
   rect((2.5, -1.2), (3, -1.5), fill: rgb("#fffc61"), stroke: none, name: "siO2")
   content("siO2", [oxide], anchor: "west", padding: 0.3)
 })
+
+#let FetPlot() = {
+  let u_gs = 1
+  let beta = 1
+
+  cetz.canvas({
+    import cetz-plot: plot
+    import cetz: draw.content
+
+    cetz.draw.set-style(axes: (
+      shared-zero: false,
+      overshoot: 0.2,
+      x: (mark: (end: ">", fill: black, scale: 0.6)),
+      y: (mark: (end: ">", fill: black, scale: 0.6)),
+    ))
+
+    plot.plot(
+      size: (2, 2),
+      name: "plot",
+      axis-style: "school-book",
+      x-min: 0,
+      x-tick-step: none,
+      y-tick-step: none,
+      x-label: $U_"GS"$,
+      y-label: $U_"DS"$,
+      {
+        plot.add-fill-between(domain: (1, 6), ((1, 0), (1, 5)), u_gs => u_gs - u_t)
+
+        plot.add(domain: (0, 5), fill: true, axes: ("y", "x"), _ => 1)
+
+        plot.add(domain: (1, 6), fill: true, u_gs => u_gs - u_t)
+
+        plot.add-anchor("I", (0.5, 2.5))
+        plot.add-anchor("II", (4.5, 1.5))
+        plot.add-anchor("III", (2.5, 3.5))
+
+        plot.add-anchor("ut", (u_t, 0))
+      }
+    )
+    content("plot.ut", $U_t$, anchor: "north", padding: 0.1)
+
+    content("plot.I", [I])
+    content("plot.II", [II])
+    content("plot.III", [III])
+  })
+}