I d'ont understand how I$\text{'}$m supposed to find the answers given for this problem :

"Tree Degrees of Freedom" $($TDF$)$ company manufactures and sells online all kinds of equipment related to climbing: from shoes, harnesses and ropes to volumes and grips to create artificial routes.

TDF$\text{'}$s CFO is now working on an investment project related to the IT of the company. You are expected to help him answer the questions associated to this text in order to help the CEO take the final decision about the project.

The investment project is supposed to last $4$ years. The investment in assets $($mainly hardware$)$ is priced to $658000$ and would be depreciated straight line to zero over $7$ years. The assets will be worthless and scrapped at the end of the project.

The improvement that the investment project would bring to the sales process is expected to generate savings every year, thus increasing the EBITDA. The variable costs are expected to decrease, going from $24\%$ to $12\%$ of the turnover but the fixed costs would not change. The project would not change the WCR of the company.

TDF is not listed on any financial market. However, ClimbEq Ltd$,$ one of its direct competitors, has been listed for $10$ years now and has a $1,4$ beta. ClimbEq has $2,2$ millions stocks outstanding, which recently closed at $6,2$ each. $2$ years ago, ClimbEq issued $93000$ bonds with a $100$ face value and $9$ years maturity. The bonds coupon rate is $7,4\%,$ they will be repaid at $102,3\%$ and their YTM is currently $4,83\%.$

TDF$\text{'}$s debt ratio is $20$ and it can borrow currently at $6,66\%$ per year.

The corporate tax rate is $36\%$ for both companies. The market risk premium is $8,92\%$ this year, and the risk$-$free rate $1,56\%.$

$1.$ What is the unlevered beta of Climbeq? $($the answer should be $0\mathrm{.}9278)$

$2.$ What is the required rate of return for TDF project? $($in $\%,$ the answer should be $182064)$

$3.$ What is the operating cash flow that the company would get from its project every year if the annual turnover is $1930000,$ assuming that the EBITDA is given by the savings on the variable costs? $($the answer should be $-8234)$

$4.$ What is the turnover that would yield a zero NPV for the project? $($the answer should be $1963663)$

$5.$ The company is considering a new loan to finance the project. The loan amount would be $395000$ euros, it would be repaid by constant annuities over $12$ years and the interest rate would be the one at which the company can currently borrow. What is the value of the constant annuity? $($the answer should be $48834)$