Final answer:
6/11 is a reasonable answer for the fraction of her bookshelf Kiki has painted.
Step-by-step explanation:
To determine if 6/11 is a reasonable answer for the fraction of her bookshelf Kiki has painted, we need to compare it to the amounts she painted on Monday and Tuesday. On Monday, Kiki painted 1/5 of her bookshelf, which is less than 6/11. On Tuesday, she painted 5/6 of her bookshelf, which is more than 6/11. Therefore, we can conclude that 6/11 is a reasonable answer for the fraction of her bookshelf Kiki has painted.