Which of the following are true about fold and foldr? $($Select all that apply$)$

Grading comment:

both fold and foldr's order for parameters is function, initial accumulator, and list.

fold is tail recursive while foldr is not

for the $(-)$ function $($given a list of integers$),$ fold and foldr would produce different results

for the $(+)$ function $($given a list of integers$),$ fold and foldr would produce different results

the function passed to fold takes in accumulator then item, and the function passed to foldr takes in item then accumulator