ABC Airlines is considering the purchase of two alternative plans.

a$.$ Plane A has an expected life of $10$ years, will cost $$100$ million, and will produce net cash flows of $$30$ million per year.

b$.$ Plane B has an expected life of $15$ years, will cost $$125$ million, and will produce net cash flows of $$25$ million per year.

c$.$ Inflation is operating costs, airplane costs, and fares are expected to be zero, and the company$$s cost of capital is $10\%.$ How much would the value of the company increase if it accepted the better project $($plane$)?$ What is the equivalent annuity for each plane? Please help me step by step. Thanks