Ten years ago, Marky Inc$$s $7\mathrm{.}5\%$ bonds were issued with a maturity of $20$ years $($annual coupons$).$ They are currently trading at $$1,013\mathrm{.}03.$ Marky intends to issue new annual coupon bonds now with a maturity of ten years. When issued, these bonds will be set to trade at par. What coupon rate must be set on these new bonds to make them trade at par? Show all work including timelines, cashflows, equations, and$$all$$other$$work$.$