You launched Project $x$ that is based on the pre$-$investor's model. Pre$-$investors denote nonprofessional or non$-$institutional investors such as friends, family and strangers who help to fund the project. However, they expect to see a return on their investment. Nonetheless, Project $x$ involves a new social media platform that seeks to generate revenue from user subscriptions. To launch the project, the pre$-$investors need to invest an accumulative amount of R$75000,00($year $0).$ As subscribers and pre$-$investors join your venture, you expect the initial investment of R$75000$ to grow, increasing with R$15550,00$ annually for four years $($years $1-4).$ In the first year, you expect the new social media platform will generate R$110000,00,$ increasing annually with R$25000,00.$ Calculate the annual discount factor based on a discount rate of $8\%.$

a$.1$;$0\mathrm{.}92$;$0\mathrm{.}87$;$0\mathrm{.}8$;$0\mathrm{.}74$

b$.1$;$0\mathrm{.}91$;$0\mathrm{.}83$;$0\mathrm{.}75$;$0\mathrm{.}68$

c$.1$;$0\mathrm{.}93$;$0\mathrm{.}86$;$0\mathrm{.}79$;$0\mathrm{.}75$

d$.1$;$0\mathrm{.}93$;$0\mathrm{.}86$;$0\mathrm{.}79$;$0\mathrm{.}74$