****************The question is two parts ************* *************please if u want to to upvote,, write the correct a

[answerhappygod]

****************The question is two parts
*************
*************please if u want to to upvote,, write the correct
answer,, otherwise, i will give u a downvote *****************
part 1:
Find thermal efficiency of a heat engine if it operates between
two energy reservoir where the temperature of the cold reservoir is
10 degrees and the temperature of the hot one is 40 degrees
part2:
If the efficiency of a Carnot engine is 80 % then what is the
ratio between the temperature of its cold reservoir to the
temperature of its hot reservoir