diff --git a/1ano/fp/extra3/ex07.py b/1ano/fp/extra3/ex07.py
new file mode 100644
index 0000000..f6e69cd
--- /dev/null
+++ b/1ano/fp/extra3/ex07.py
@@ -0,0 +1,2 @@
+def companyVolume(stocks, city):
+    return [(stock[0], stock[4]) for stock in stocks if stock[1] == city]
diff --git a/1ano/fp/extra3/ex08.py b/1ano/fp/extra3/ex08.py
new file mode 100644
index 0000000..f9a45a4
--- /dev/null
+++ b/1ano/fp/extra3/ex08.py
@@ -0,0 +1,7 @@
+def load(fname):
+    stocks_list = []
+    with open(fname, 'r') as f:
+        for stock in f:
+            components = stock[:-1].split('\t')
+            stocks_list.append((components[0], components[1], float(components[2]), float(components[3]), int(components[4])))
+    return stocks_list
diff --git a/1ano/fp/extra3/ex09.py b/1ano/fp/extra3/ex09.py
new file mode 100644
index 0000000..c48847f
--- /dev/null
+++ b/1ano/fp/extra3/ex09.py
@@ -0,0 +1,8 @@
+def trinsPerMerchandise(trains):
+    content_dict = {}
+    for train, content in trains.items():
+        for item in content:
+            if item[0] not in content_dict:
+                content_dict[item[0]] = set()
+            content_dict[item[0]].add(train)
+    return content_dict
diff --git a/1ano/fp/extra3/ex10.py b/1ano/fp/extra3/ex10.py
new file mode 100644
index 0000000..07ced4f
--- /dev/null
+++ b/1ano/fp/extra3/ex10.py
@@ -0,0 +1,10 @@
+def unload(t, m, q):
+    for v in t[::-1]:
+        if v[0] != m:
+            continue
+        while v[1] > 0 and q > 0:
+            v[1] -= 1
+            q -= 1
+        if v[1] == 0:
+            t.remove(v)
+    return q
diff --git a/1ano/fp/extra3/ex11.py b/1ano/fp/extra3/ex11.py
new file mode 100644
index 0000000..eea9be7
--- /dev/null
+++ b/1ano/fp/extra3/ex11.py
@@ -0,0 +1,11 @@
+def onlyCaps(s):
+    # NOTE: ch.isupper() -> True if ch is uppercase.
+    if len(s) == 0:
+        return ""
+    if len(s) == 1:
+        return s if s.isupper() else ""
+    return s[0] + onlyCaps(s[1:]) if s[0].isupper() else onlyCaps(s[1:])
+
+
+print(onlyCaps("John Fitzgerald Kennedy"))
+print(onlyCaps(""))