Answer:
Yes
Explanation:
Given Data
Temprature of source=750°c=1023k
Temprature of sink =0°c=273k
Work produced=3.3KW
Heat Rejected=4.4KW
Efficiency of heat engine(η)=
and
Heat Supplied 

η=
η=42.85%
Also the maximum efficiency of a heat engine operating between two different Tempratures i.e. Source & Sink
η=1-
η=1-
η=73.31%
Therefore our Engine Efficiency is less than the maximum efficiency hence the given claim is valid.
57.5 m/s
I did 2.3/0.04
I’m not sure if it’s correct though
But to answer your question on easy character i say rob he has a very good recovery good down throw good combos to get u from zero to 60 and has his spin to win plus laser and disk he can zone attack and if u side b someone off stage you can try to side b them again and it will kill thats if u land it though