How do I fill out a w4 form? I am 18 years old and never had a job before.

I am 18 years old, a full time college student, and my parents still claim me as a dependent. I will be working part time and will only be making $10 an hour for about 8 hours a month. I will only be working until the semester is over so in total I will only be working for about 5 months, making about a total of about $400 (give or take a couple dollars). Will I be able to claim exempt on the w4 form or should I claim 1 allowance (1 because I am single and only have one job)? Since I never worked before I meet the two criteria in order to claim exemption (do I? Someone please confirm this) - Last year I had a right to a refund of all federal income tax withheld because I had no tax liability, and this year I expect a refund of all federal income tax withheld because I expect to have no tax liability.

I just don't want to get into any trouble with the IRS so please help me. Thank you