9. Refer to the following extract of 2019 policy address from SCMP: "Rent control regulations that have been put aside for years will be reconsidered ......... in an upcoming study to alleviate hardships of the poor, Hong Kong leader Carrie Lam Cheng Yuet-ngor has said." (Adopted from humps://www.semp.comeww/hong-kong/politics/article/3033450/hong-kong-leader -carrie-lam-says-return-rent-control-and) a. Depict the impact of rent control in a demand-and-supply diagram