Add lab session 3

Handed in on 27 Oct 2020.

Change-Id: I00ae5f8e3910fa1ba0b2579e88894f3b5292fb1f
diff --git a/p3/data/exp3/fase2_5kg_17n_lent.dat b/p3/data/exp3/fase2_5kg_17n_lent.dat
new file mode 100644
index 0000000..a50cca0
--- /dev/null
+++ b/p3/data/exp3/fase2_5kg_17n_lent.dat
@@ -0,0 +1,15 @@
+0	21.4
+30	21.4
+60	21.4
+90	21.4
+120	21.4
+150	21.4
+180	21.7
+210	22.2
+240	23.1
+270	24
+300	24.8
+330	24.7
+360	24.7
+390	24.7
+420	24.7