Kohana designed a pattern with four missing pieces. Help complete Kohana's pattern by entering rules to transform each figure from the table.

hi i’m going tomorrow morning and i can come over and you out with this stuff for me haha ya day is going crazy and i’ll tell you what i’m talking about you don’t wanna go do you think i’m going to be a good friend i just don’t know how much you mean about the stuff you want to do and stuff you know i just want you and you know that i’m going crazy i don’t think i’m going crazy about going tomorrow and i’ll tell ya hey i don’t think i’m going crazy about going tomorrow and i’ll tell you what i’m done

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer

the answer to that one is b