Q4. Do calculations to check whether SG8 floor joists with 300mm x 50mm (280 x 45mm) sections are able to resist a maximum moment demand, due to 1.2G+1.5Q, of M*= 3.9kNm. Note that because the floor joists are connected via plywood sheets (assume the sheets are 1200mm wide), a strength-sharing factor, k₉, has been evaluated for you as k₉ = 1.19. Report the ratio of M*/ϕM_n. [%]