please show formulas used on pen and paper with no excel please, will upvote if you do not use excel :) with clear formula and step pen and paper

Lokit Inc. is deciding whether to buy or lease equipment. The equipment costs $2.5 million and it will be worth zero after three years. The company's borrowing rate is 4.5%. The lease payments are $900,000 million per year for three years, payable at the beginning of each year. The equipment qualifies for a CCA rate of 24% per year. The assets pool remains open and the company's tax rate is 29%. 1) Should the company buy or lease the asset? 2) Assume the lessor's tax rate is 29%. Is the lease profitable to the lessor? 3) What payment would leave the company indifferent to leasing or not leasing