Please show clear steps thank you Three dice a blue a red an

Please show clear steps. thank you

Three dice, a blue, a red, and a yellow, are rolled, giving a sum of 13. The red and yellow dice are rerolled, with a new sum on all 3 dice of 6. The blue and red dice are rerolled, giving a sum on all 3 dice of 15. Finally, the blue and yellow dice are rerolled, giving a sum on all 3 dice of 7. Find the sum of the 3 numbers rolled on the yellow die.

Solution

D. 11