The person appears to be a/an Black Female, approximately 30 to 39 years old.
The grammatical mistake in the sentence is a verb conjugation error. The correct form of the verb should be 'read' instead of 'readed'. 'Readed' is not a valid form of the verb 'read', which is correctly used in the past simple tense as 'read' (pronounced like 'red').
The mistake in this sentence is a verb conjugation error. The correct form of the verb should be 'read' instead of 'readed'. 'Readed' is not a correct form of the verb 'read', which should be used in the past simple tense as 'read' (pronounced like 'red').