There is a database that contains a website's traffic data over a period of 30 days. The first table contains users' information including the user type (user, crawler, admin). The second table consists of the time of each visit to the website, the id of the visitor, time spent on the website in seconds. Write an SQL query to show the 3 day moving average of time spent on the website for users.user_type = 'user'. Note: avg time spent must have 4 decimal digits and rounded off (example: 5/3 = 1.6667, 5/2 = 2.5000 and 1/3= 0.3333) Schema There are 2 tables: users, traffic Name id name Name user_type VARCHAR Type of the user user_id visited_on users time spent Type Description INTEGER The user's unique id. It is the primary key. VARCHAR This is the second column and the name of the user. traffic Type INTEGER DATE INTEGER time spent on website in seconds Description id of the user from the users table. date on which the user visited the website