Add lab session 4
Handed in on 10 Nov 2020.
Change-Id: Iac2b326e564a415d56c927b1900856d55fd6b9ed
diff --git a/p4/data/mesura3_deriva.dat b/p4/data/mesura3_deriva.dat
new file mode 100644
index 0000000..a6891d1
--- /dev/null
+++ b/p4/data/mesura3_deriva.dat
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