Pls answer this math​

Agrocery sells green apples and red apples. on monday , the store put 500 of each kind of apple on display. that day, the store sold 42 red apples and 57 green apples.on tuesday the store sold 87 red apples and 75 green apples. on wednesday, the store sold 29 red apples and 38 green apples

Consider the function f(x)=−2/3x+5 . what is f(1/2) ? enter your answer, as a simplified fraction, in the box. f(1/2)=

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds