Write an email to your younger brother to be serious in studies.
From : email@example.com
To : firstname.lastname@example.org
Sent : Sunday, 17 August 2014, 11.00 am.
Subject: Letter to be serious in studies.
I received a letter from father and came to know that you are not serious in studies. It is a matter of grief that being a student you are not serious. Do you know what will happen if you make bad result in the exam? If you are not serious in studies, you will be ruined in future. This is the age of competition. Without making good result you will not be able to survive yourself in any sector of life. So dear brother, I like to advise you to be serious and sincere in studies just from today.
Wishing you best of luck