Analyse whether the traders below have committed an offence under the Trade Description Act $2011.($a$)$ A supermarket displayed an advertising banner at the entrance, which clearly stated $$New High Quality Shampoo at low price $$ buy one bottle and get another for free $$ for RM$20\mathrm{.}00$ only$.$ Mariam bought the shampoo. She later discovered that the same shampoo was priced at RM$10\mathrm{.}00$ per bottle in a nearby grocery store. $(8$ marks$)($b$)$ The advertisement states $$Paradise Resort $$ a beachfront hotel with swimming pool$.$ Mariam booked a room at the hotel. Upon arrival, she discovered the swimming pool was still under construction.