Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

R is an average of the color rendering ability of ____ or more specific colors.
eight

People often have to wait between three and ____ years for an organ especially for a liver.
five

Osteoporosis has ____ symptoms and it progresses slowly.

no