How many persons attend the seminar between the one who uses BMW and U?

Study the following information carefully and answer the questions given below. Twelve persons A, C, D, E, H, J, K, N, O, S, U and Z attends the seminar in January, June, October and April in the same year. They attend the seminar in different dates viz., 4, 7 and 19th of the given months. Each one of them uses different types of car namely Toyota, BMW, Hyundai, Mercedes, Renault, Audi, Honda, Ferrari, Volvo, Mahindra, Datsun and Bentley but not necessarily in the same order. J and the one who uses Volvo attend the seminar on a month which has less than 31 days. Number of persons attends the seminar before K is two less than the number of persons attends the seminar after the one who uses Ferrari. Three persons attend the seminar between U and the one who uses Audi. J does not attend the seminar on even number date. The one who uses Bentley attends the seminar in 7th of October. E attends the seminar immediately after N. J does not use Mercedes. The one who uses Mercedes attends the seminar after E. N attends the seminar on even numbered date. Two persons attend the seminar between H and the one who uses Mercedes. H does not use Volvo. Neither N nor E uses Volvo. Three persons attend the seminar between J and the one who uses Volvo. K attends the seminar before the one who uses Ferrari. D attends the seminar immediately after the one who uses Ferrari. Number of person attends the seminar before the one who uses Toyota is same as the number of person attends the seminar after the one who uses Datsun. N does not use Datsun. Number of persons attends the seminar before A is same as the number of person attends the seminar after
C. Only one person attends the seminar between Z and the one who uses Mahindra. H and K use neither Toyota nor Datsun. The one who use Honda attends the seminar immediately after
C. The one who uses Audi attends the seminar before the one who uses Mahindra, but not immediate before. Three persons attend the seminar between E and the one who uses Mercedes. Neither K nor E uses Hyundai. E does not Renault. S does not use Bentley.