The cost of a small bottle of juice is $y The cost of a large bottle of juice is $(y+1)
When Catriona spends $36 on small bottles she receives 25 more bottles than when she spends $36 on large bottles only
(i)show that 25y²+25y-36=0
(ii)factorise 25y²+25y-36=0
(iii) solve the equation 25y²+25y-36=0
(iv)Find the total cost of 1 small bottle of juice and 1 large bottle of juice.