help solving this story problem - linear prob?

Question

hey, need some help creating the functions for this story problem...

- The minimum number of employees that must be working each day of the week is as follows :

mon : 17
tue : 13
wed : 15
thu : 19
fri : 14
sat : 16
sun : 11

Each employee has to work 5 days in a row and then take a break for 2 days in a row. What is the minimum number of employees the company needs in order to run?

detailed explanation of how to find the functions appreciated!
thanks

- EDIT - I am looking for functions to create a graphical solution, something like that : http://ece.ut.ac.ir/classpages/S84/Operation%20Research/1.png

Answer 1

75 employees ?
Total Number of Employees (Excluding the fact that ,Each employee has to work 5 days in a row and then take a break for 2 days in a row)
is 105
Now taking the second fact into consideration,
We multiply the Sum of Employees by 5 and divide by 7

Answer 2

75 employees ?
Total Number of Employees (Excluding the fact that ,Each employee has to work 5 days in a row and then take a break for 2 days in a row)
is 105
Now taking the second fact into consideration,
We multiply the Sum of Employees by 5 and divide by 7

Answer 3

21 employees needed.