diff -r a56a6c28b700 -r 32dfd2ca577b testing1/drumb_test3.scala
--- a/testing1/drumb_test3.scala	Tue Oct 29 11:11:44 2019 +0000
+++ b/testing1/drumb_test3.scala	Tue Oct 29 14:12:24 2019 +0000
@@ -1,3 +1,4 @@
+import CW6b._
 
 assert(get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
     List(List(Some(311.349976), Some(20.544939)),