Arthur buys a mobile phone from "Outlast phones" which says in its advertisements that it has the best battery life of any phone in Australia and should last at least 48 hours after a full charge

Business Sep 11, 2020

Arthur buys a mobile phone from "Outlast phones" which says in its advertisements that it has the best battery life of any phone in Australia and should last at least 48 hours after a full charge. The battery in Arthurs phone only lasts for 10 hours

If Arthur wants to claim against Outlast Phones
a)   What provisions of the ACL could he use?
b)   What provisions of The ACL would apply if he buys the phone second hand on gumtree?
c)   What cases support your answer?