Q$4.[20$ Marks$]$ An investor borrows money at effective rate of interest of $\backslash (5\backslash \%\backslash )$ per annum to invest in an $8$ year project. The cashflows are as follows $($a$)[6$ Marks$]$ Calculate the net present value of the project. $($b$)[7$ Marks$]$ Determine, with justification, if the project has a discounted payback period. Find the discounted payback period for the project if it exists. $($c$)[7$ Marks$]$ Find an approximate value for the internal rate of return. NO EXCEL on paper please no chatgpt either thank you