PLEASE HELP ME WITH ONLY QUESTION 4. ANAWER ALL THREE STATEMENTS PROPERLYQuestion 4Using the information below, make a recommendation with reasons to the following consumers on which plan they should choose.Consumer AAge 65, Married with no children. Ex-CEO of a SME. Owns a bungalow in Sentosa. Does not have many friends, spends weekend at home with spouse. ( 3 marks )Consumer B Age 26, Single. Investment banker working in CBD. Has to travel regularly to meet clients. Has an active social life. ( 3 marks )Consumer C Age 18, currently in long term relationship. Unemployed. Receives a minimal monthly allowance from parents. Loves hanging out with friends during the weekends. ( 3 marks )

Mathematical Modelling: Choosing a cell phone plan Today, there are many different companies offering different cell phone plans to consumers. The plans these companies offer vary greatly and it can be difficult for consumers to select the best plan for their usage. This project aims to help you to understand which plan may be suitable for different users. You are required to draw a mathematical model for each plan and then use this model to recommend a suitable plan for different consumers based on their needs. Assumption: You are to assume that wifi calls are not applicable for this assignment. Question 1 The following are 4 different plans offered by a particular telco company: Plan 1: A flat fee of $50 per month for unlimited calls. Plan 2: A $30 per month fee for a total of 30 hours of calls and an additional charge of $0.01 per minute for all minutes over 30 hours. Plan 3: A $5 per month fee and a charge of $0.04 per minute for all calls. Plan 4: A charge of $0.05 per minute for all calls: there is no additional fees. (a) If y is the charges of the plan and x is the number of hours spent on calls, what is the gradient and y-intercept of the function for each plan? ( 10 marks ) (b) Write the equation of the function for each plan. ( 8 marks ) Question 2 -Using functions you have created in Question 1, plot a graph using EXCEL to show all the 4 plans in the same graph. (Hint: Suitable range of x-axis is 0 to 100 hours with the interval of 5 hours. Choose a suitable range for the y-axis.) - Label your graph and axis appropriately. ( 11 marks )