Repeating bead patterns II

This task is about repeating patterns.
bead pattern on a string
Three students thread some beads on a string to make a repeating pattern.

Question 2Change answer

​a)  Maraea has 7 'sets' of the pattern.

   i) How many striped beads does she have?  

   ii) How many shaded beads does she have?   ​

Question 2Change answer

b) David has 8 striped beads. How many shaded beads does he have? 

c) Sarai has 6 shaded beads. How many striped beads does she have? ​

Question 2Change answer

d)  In the table below write how many striped or shaded beads are needed for each set of the repeating pattern.   
Number of sets
Beads
 
Number of striped beads
Number of shaded beads
1
2
3
5
10
40
​
Explain how you can work out the number of striped beads, and the number of shaded beads from the number of 'sets'.