Create a SQL query to determine the average first reply time and average first resolution time by month for the past 12 months.
a) SELECT MONTH(date), AVG(reply_time), AVG(resolution_time) FROM tickets WHERE date >= DATE_SUB(NOW(), INTERVAL 12 MONTH) GROUP BY MONTH(date);
b) SELECT MONTH(created_at), AVG(reply_time), AVG(resolution_time) FROM support_tickets WHERE created_at >= DATE_SUB(NOW(), INTERVAL 12 MONTH) GROUP BY MONTH(created_at);
c) SELECT MONTH(time_stamp), AVG(reply_time), AVG(resolution_time) FROM support_tickets WHERE time_stamp >= DATE_SUB(NOW(), INTERVAL 12 MONTH) GROUP BY MONTH(time_stamp);
d) SELECT MONTH(ticket_date), AVG(first_reply_time), AVG(first_resolution_time) FROM support_tickets WHERE ticket_date >= DATE_SUB(NOW(), INTERVAL 12 MONTH) GROUP BY MONTH(ticket_date);