4) Jamie has a piggy bank in which she saves all of her R5, R2 and R1 coins. The coins are in a ratio
of 2:5:7 respectively.
a)
If she has twelve R5 coins saved in her piggy bank. How much has she saved?
b) If she has R70 in R2 coins, how many R5, R2 and R1 coins has she saved?