 <translate> Q:In preparation for his mountain climbing, Arvin wants to run a total of 20 kilometers in a week. On the first day, he ran 2 kilometers. On each subsequent day, he increased his running distance by 1 kilometer over the previous day. If he runs for 5 days a week, how many kilometers did he run on the 5th day?
A:6 <yor> Ìbéèrè: Láti múra sílẹ̀ fún gbígun òkè, Arvin fẹ́ sáré ogún kìlómítà láàárín ọ̀sẹ̀ kan. Lọ́jọ́ àkọ́kọ́, ó sáré kìlómítà méjì. Lọ́jọ́ kọ̀ọ̀kan, ó máa ń fi kìlómítà kan ju bó ṣe sá lọ. Tó bá ń sáré ní ọjọ́ márùn-ún lọ́sẹ̀, kìlómítà mélòó ló sáré ní ọjọ́ karùn-ún? A: 6 