Answer:
I do 1 option for you as an example, you need to check the leftover by yourself.
Step-by-step explanation:
for d) y(0) = 0 and y'(pi) =0



Replace
we have
if and only if 
Hence the given solution does not work.
then, d is NOT the correct answer.
Answer:
Step-by-step explanation:
how do i circle? i know answer but how to tell you?
150 miles per hour (pretty slow for a plane so I hope that's correct)