calculate the IRR internal rate of return

#1 Loaid of 120,000 to be repaid in 2 years according to the French method at an interest rate of 12% nominal per year. This loan has a study fee of 1% and no formalization fees. #2 Loan of 4,000,000 to be repaid in 4 years according to the French method at an interest rate of 6% nominal per year. This loan has a study fee of 1% and formalization fee of 1500. #3 Loan of 700,000 to be repaid in 3 years according to the French method at an interest rate of 4,5% nominal per year. This loan has a study fee of 1% and formalization fee of 1000. #4 Loan of 80,000 to be repaid in 10 years according to the French method at an interest rate of 3,5% nominal per year. This loan has a study fee of 2% and no formalization fee