no excel please will rate $!$

You are considering the following two projects and can take only one. Your cost of capital is $10\mathrm{.}6\%.$ The cash flows for the two projects a as follows $($ $ million$)$: $.$

a$.$ What is the IRR of each project?

b$.$ What is the NPV of each project at your cost of capital?

c$.$ At what cost of capital are you indifferent between the two projects?

d$.$ What should you do$?$

Data table

$\backslash$table$[[($Click on the following icon in order to copy its contents into a spreadsheet.$)],[$Project$,$Year $0,$Year $1,$Year $2,$Year $3,$Year $4],[$A$,-$$$100,$$$24,$$$30,$$$41,$$$48$