this is the background information

A supermarket can purchase an automated checkout machine for $100,000 (to be paid in year 0) that has an

estimated life of 5 years. Servicing and maintenance over that period will begin at $2,500 per annum (at the end

of year 1) and increase at a 10% rate every year. If the checkout machine is purchased, the supermarket will not

be required to hire one additional checkout operator. The checkout operator costs $28,000 per year (assume this

is also at the end of each year beginning with year 1), and this amount is expected to increase at 5% annually. If

the supermarket's cost of capital is 10%, which alternative should be selected. Assume all annual cashflows occur

at the end of each year

and this is the question you only need to answer

3 Why should bond investors be cautious when relying on yield to maturity? Is it an accurate measure of rate of return for investors who might not hold their bonds to maturity? Help Fill in your answer here