I just realized the TI-84 Plus CE had the function to answer these. Can you let me know what I have to put into the calculator to get the answers?

BSU Inc. wants to purchase a new machine for $44,300, excluding $1,500 of installation costs. The old machine was bought five years ago and had an expected economic life of 10 years without salvage value. This old machine now has a book value of $2,200, and BSU Inc. expects to sell it for that amount. The new machine would decrease operating costs by $10,000 each year of its economic life. The straight-line depreciation method would be used for the new machine, for a six-year period with no salvage value. Click here to view the factor table. (a) Determine the cash payback period. (Round cash payback period to 2 decimal places, e.g. 10.53.) Cash payback period years (b) Determine the approximate internal rate of return. (Round answer to 0 decimal places, eg. 13%. For calculation purposes, use 5 decimal places as displayed in the factor table provided.) Internal rate of return %