Add continuum mechanics' P4 lab session

Change-Id: I15a80d28235451f82743b553044662dd66876764
diff --git a/quad8/continuummechanics/lab/p4/data/regresio.dat b/quad8/continuummechanics/lab/p4/data/regresio.dat
new file mode 100644
index 0000000..70781da
--- /dev/null
+++ b/quad8/continuummechanics/lab/p4/data/regresio.dat
@@ -0,0 +1,10 @@
+0.6	0.55495
+0.5652173913	0.54695
+0.5238095238	0.501
+0.4736842105	0.4008
+0.4117647059	0.38045
+0.3333333333	0.33385
+0.2857142857	0.2607
+0.2307692308	0.20705
+0.1666666667	0.17075
+0.09090909091	0.09875
diff --git a/quad8/continuummechanics/lab/p4/data/ws_vs_qs.dat b/quad8/continuummechanics/lab/p4/data/ws_vs_qs.dat
new file mode 100644
index 0000000..73ee4aa
--- /dev/null
+++ b/quad8/continuummechanics/lab/p4/data/ws_vs_qs.dat
@@ -0,0 +1,10 @@
+110.99 15
+109.39 13
+100.2 11
+80.16 9
+76.09 7
+66.77 5
+52.14 4
+41.41 3
+34.15 2
+19.75 1