Here you will find Erik Løw's solutions (in Norwegian) of last years weekly exercises. Be aware that in some cases a problem may have changed number from last year:
Set 1 (section 1.1-1.6)
Set 2 (section 2.1-2.4)
Set 3 (section 2.4-2.5)
Set 4 (section 2.6-3.2)
Set 5 (section 3.3-3.5)
Set 6 (section 3.5-3.7)
Set 7 (section 3.8-4.1)
Set 8 (section 4.2-4.4)
Set 9 (section 4.5-4.6)
Set 10 (section 4.6-5.1)
Set 11 (section 5.1-5.2)
Set 12 (section 5.3-5.4)
Set 13 (section 5.5-5.6)
Set 14 (section 5.7-6.1)
Set 15 (section 6.2-6.4)
Set 16 (section 6.4-6.7)
Set 17 (section 6.7-7.2)