PLEASE HELP

(a) What is the mortgage amount she will borrow?
(b) Can she afford this mortgage? Justify your response.
When buying a home, 2 times your gross annual income is the magic number
Mortgage ≤ 2 · Gross annual income
(c) What will her monthly mortgage payment be?
(d) What will her total payment for the house be?
(e) What is the amount of interest she will pay

PLEASE SHOW YOUR WORK!!!

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books