Q$2$: Company X$,$ whose tax rate $=20\%,$ is considering a lease of $9$ years, which has constant yearly payments of $$22,700($note: financing costs are $$23,500$ to buy$).$ Assuming company X$\text{'}$s before$-$tax leasing rate $=8\%$ and the net cost of buying $=$ $$115,200,$ should company X lease the asset?

Q$3$: STK Inc., who is taxed at $$0\mathrm{.}20$ of every dollar earned, has a debt$-$to$-$equity ratio of $\frac{1}{5},$ where its equity totals $$1,200,000$ debt and equity investors require $8\mathrm{.}5\%$ and $9\mathrm{.}75\%,$ respectively; what is YSJ Inc.$\text{'}$s WACC, and how are your computations impacted if the D$/$E is lowered to $15\%($show all your work$)?$

Q$4$: A company has interest expenses totaling $=$$$722MM,$ for which they pay $7\frac{\%}{?}$ annum to their lender. Last year, the company paid $$827$ MM in tax, based on earnings before taxes of $$4,135M$; what amount of additional taxes would the co$.$ pay if they were all equity$-$financed $($i$.$e$.,$ no debt$)$ and what is the PV of tax shield $($assume all metrics stay constant in perpetuity$)?$

Q$5$: A piece of equipment costs $$125,000$ today to buy, but company YGR Inc. $($whose cost of capital $=7\mathrm{.}25\%)$ is considering a lease arrangement. The equipment has an approximate lifespan of $8$ years, at which time the salvage value $=$$$15,000.$ Annual maintenance costs $($performed at year$-$end$)$ are expected to be $$1,550($these are to grow by $3\%$ per year$).$ If the PV of CCA tax shield and PV of lease payments are $$32,550$ and $$72,400,$ respectively, should YGR Inc. lease the equipment?