With reference to the Contracts Act 1950 or any case law, answer the following questions. (a) Alpha Medical Company placed an advertisement in NST, Star, Berita Harian and other newspaper for their products, stating that any person who purchased and used their product, herbal syrup but still contracted Covid-19 despite properly following the instructions would be entitled to a RM1,000 reward. The advertisement further stated that the company had demonstrated its sincerity by placing RM10,000 in Maybank account to act as the reward. Sarah saw the advertisement and purchased the herbal syrup and, despite properly using it, she contracted Covid-19 and attempted to claim the RM1,000 reward from the Alpha Medical Company. Alpha Medical Company contended that they could not be bound because it was an advertisement. Advise Sarah whether she is entitled to the reward of RM1,000.

(b) Malani sees a diamond ring on display at Habid Jewel's shop window, the price tag indicates RM20,000. Excited that the deal was good, she rushes to the counter only to be told that there was a mistake on the label and that the actual price of the necklace is RM30,000. Malani demands that Habid Jewel sells the necklace to her at the price stated on the tag. Advise whether Habid Jewel is bound to sell the necklace at the price of RM20,000.