#a
a = [5,2,4]
b=a[0]
b= b+1
print("oppgave a:",a[0])
#b
a = [10,8,7]
b = a
c = b
b[0] =3
c[1] =4
print("oppgave b:",a)
#c
class Person:
    def __init__(self,alder):
        self._alder = alder

    def doble_alder(self):
        self._alder = self._alder*2

    def hent_alder(self):
        return self._alder

    def alder_som_maaneder(self):
        return self._alder*12

p1 = Person(3)
p2 = p1
p3 = Person(5)
p4 = p3
p1.doble_alder()
print("oppgave c:")
print(p1.hent_alder())
print(p1.hent_alder())
print(p3.alder_som_maaneder())
print(p4.hent_alder())