$6.$ Question $6$:

$*$Layer $1$:$*$ Analyze the role of government policies and regulations in shaping the trajectory of the petroleum industry, including measures to promote energy security, environmental protection, and economic development.

$*$Layer $2$:$*$ Furthermore, evaluate the effectiveness of various policy instruments such as taxation, subsidies, and emission trading schemes in achieving policy objectives while balancing the interests of stakeholders across the energy value chain.