There is data representing the daily working hours of 5 employees of "horizon bakery cafe". A manager would like to determine that their recommended working hours are 8 on average. Using a two-tailed approach write down the appropriate null and alternative hypothesis. How many degrees of freedom does the data have?

Employee	working hours
1	7.8
2	5.5
3	4.6
4	6.3
5	8.5