Answer:
A. Your friend has failed in the exam
Advice: You ought to study more.
B. Your friend never goes out.
Advice: You ought to go out more.
C. Your friend doesn't like to play games.
Advice: You ought to have more fun.(?)
D. Your friend doesn't read seriously.
Advice: You ought not to take reading as a laughing matter.
E. Your friend doesn't obey his/ her parents.
Advice: You ought not to disobey your parents('You ought to listen to/ obey your parents" could also work)
F. Your friend sleeps late in the morning.
Advice: You ought to wake up earlier.
Step-by-step explanation: