 
 <translate> What is the average age of the 1st and 5th fastest dogs if the 1st fastest dog is 10 years old, the 2nd fastest dog is 2 years younger than the first fastest dog, the 3rd fastest dog is 4 years older than the 2nd fastest dog, the 4th fastest dog is half the age of the 3rd fastest dog, and the 5th fastest dog is 20 years older than the 4th fastest dog? Let's be accurate as possible. <ibo> Gịnị bụ nkezi afọ nke 1st na 5th kasị nkịta ma ọ bụrụ na 1st kasị nkịta bụ 10 afọ, 2nd kasị nkịta bụ 2 afọ tọrọ mbụ kasị nkịta, 3rd kasị nkịta bụ 4 afọ okenye karịa 2nd kasị nkịta, 4th kasị nkịta bụ ọkara afọ nke 3rd kasị nkịta, na 5th kasị nkịta bụ 20 afọ okenye karịa 4th kasị nkịta? Ka anyị mee ka nke a doo anya. 