The data of a primary school teachers is shown by the Venn diagram given below. The teachers teach multiple subjects. The 'Circle' represents teachers who teach 'English': the 'Triangle' represents teachers who teach 'Science', the 'Rectangle represents teachers who teach 'Mathematics' and the 'Quadrilateral' represents 'Female teacher'. The numbers given in the diagram represents number of teachers of that particular category. How many female teachers are there who teach mathematics but do not teach Science?