Average of multiple columns

Table name: `boss_bos`

rate1_bos	rate2_bos	rate3_bos	rate4_bos	rate5_bos
2	4	6	8	10
0	0	3	0	0

To take average


SELECT *,(
`rate1_bos` + `rate2_bos` + `rate3_bos` + `rate4_bos` + `rate5_bos`
) /5 AS Average
FROM `boss_bos`
ORDER BY Average DESC;