Add lab session 3

Handed in on 27 Oct 2020.

Change-Id: I00ae5f8e3910fa1ba0b2579e88894f3b5292fb1f
diff --git a/p3/data/exp4/fase2_1kg_3n_rapid.dat b/p3/data/exp4/fase2_1kg_3n_rapid.dat
new file mode 100644
index 0000000..4a4a190
--- /dev/null
+++ b/p3/data/exp4/fase2_1kg_3n_rapid.dat
@@ -0,0 +1,17 @@
+0	27.8
+15	27.6
+30	27.8
+45	27.8
+60	27.8
+75	27.8
+90	27.8
+105	28
+120	28
+135	28.2
+150	28.2
+165	28.2
+180	28.2
+195	28.2
+210	28.2
+225	28
+240	28