Please do it in detail way i need it for prepare my exams

Question 6 Lilly has two options to save for retirement: [1] establish her own retirement plan with annual contributions up to $15,000; which is the maximum she can afford to save for this purpose. [2] Join her employer's plan and pay a minimum of $3,000 while the employer matches 1:1 whatever amount she pays. The maximum amount the employer will match per year is $4,000. That is, if Lilly contributes for example $7,000 to her employer's plan, she will get the maximum match of $11,000 (7,000 her money and 4,000 from employer) deposited into her employer's retirement plan every year. Lilly is an intelligent investor and understand economics very well. She knows she can achieve 6.5% per year of growth if she manages her own retirement plan. The employer's plan has an expected annual return of 4.7%. She plans to cash her retirement plan after 25 years. She is also aware that while the employer's plan has "free" money, its return is lower than her self-managed investment. [a] If Lilly must choose one of those plans (she cannot subscribe to both), which one should she choose? [b] If Lilly is allowed to subscribe to both plans simultaneously (following all previous rules regarding minimum and maximum contributions), what is the best strategy to maximize her retirement plan? You will need to be as clear and detailed as possible in answering this part. Question 9 A company is investing in a new expansion project which will cost $180,000 paid over 2 equal payments of $90,000. one payment is due now, one at the end of the first year. The project will start generating revenues of $44,000 per year at the end of the second year and up to and including the 10th year. Minimum Acceptable Rate of Return (MARR) = 7%. Please note that because this project is an investment, MARR provides the mathematical interest rate used for calculations (i). a] Draw the cash flow diagram (CFD) for this investment showing cost and revenue components of the CFD. b) If all the initial costs needed for this investment are to be financed from a line of credit. What is remarkable about a line of credit, as opposed to a loan, is that one can borrow the money whenever you want. Interest will only accrue after you borrow. The credit limit will always be available, even if you choose not to use it. That is, money can be borrowed whenever needed from an account up to $500,000. Find the maximum interest rate for this line of credit so that the project is feasible. The company decided to pay back this money to the line of credit as a lump sum (one payment) at the end of the project (whenever the last revenue is received)