using baii calculator please.

My friend has a business opportunity available to him. He says that if I invest with him, 1 will receive $1500 a month for five years from the investment. I believe that for such a risky investment I need to get at least 18% return. How much is the most I should be willing to give him (PV)? If the investment is expected to last forever, how much is the most I should give him (PV)? I evaluate starting a business. I believe that I will make $12500 in year 1,$10000 in year 2,$7500 in year 3 and $5000 in year 4 . I believe for a risky project like this I should get at least a 12% return. What is the most I should be willing to invest (PV)? If I had to only invest $16500, what rate of return would 1 receive? I want to buy a car. I pay $520 per month for five years. The quoted APR is 6.9%. How much did 1 pay for the car(PV)? What is the balance(BAL) on the loan after 21/2 years, if I made every $516 payment on time? How much of payment 2 is interest (INT)? How much goes to principal (PRN)? If 1 make payments of $580 per month, how long will it take me to pay off the loan(N)? If the best offer was $550 per month from the dealership, how much did they want for the car (PV)? If the quoted APR on my credit card is 18%, what is the effective annual rate I am paying if the compounding period is monthly? Daily