Please I need solutions to the following questions

Consider an economy described by the following equations: Aggregate consumption: C : 400 + 0.2(Y T ); Aggregate investment: I = 120 10f ; Government sector: G = T = 100. o Derive the aggregate demand function; 0 Calculate the equilibrium level of income. 0 What is the effect of an increase in the interest rate on the equilibrilnn level of income? Section C: Performance Activity Objective: To provide you with an opportunity to demonstrate the required performance elements for this unit. A signed observation by either an approved third party or the assessor will need to be included in this activity as proof of completion. This activity will enable you to demonstrate the following performance evidence: Source and analyse information for business decisions Contribute information and the outcomes of analysis to decision making Disseminate information to relevant groups and individuals Design, test and adjust information systems to meet needs and objectives Answer the activity in as much detail as possible, considering your organisational requirements. 1. This is an ongoing practical activity which will require you to source and analyse information for the following types of business decisions: Identifying business problems and issues and related knowledge and data requirements Confirming the clear and relevant objectives for analysis of information Applying statistical analysis, sensitivity analysis and other techniques to draw conclusions relevant to decisions Ensuring sufficient valid and reliable information or evidence is available to support decisions Using formal and informal networks to source information not held in formal systems `Identifying and accessing sources of reliable information Using technology as appropriate Consultation with stakeholders and specialists. You will be expected to take decisions in accordance with the findings of your analysis. Such decisions should be taken in accordance with organisational guidelines and procedures. You should also ensure consistency with organisational objectives, values, and standards. This activity will need to be observed, and a signed record of this observation (completed by the assessor or third party) should be uploaded in your answer. It should detail what was done, when it was done, the time it was completed in, the completed actions and the overall outcome of the tasks