Hello professor. I have a few questions here: 1. Regarding error messages, for the error messages provided in Sample Queries, if other error conditions are encountered, is there a template for the output error message? Or can I write my own error message such as "Please enter the correct Country Code". 2. Regarding case sensitivity, please tell me if there is case sensitivity. I think that by entering the information MALE, mALe, and mALE, you should get the correct information about male. Also for country code, Jpn should have the same effect as JPN. Is my understanding correct? Or does it mean that in the country code, only the all-capital JPN is correct, and in the gender, only Male is correct, and other information should output an error message such as "Please enter the correct gender"? Thank you.