For the given two beam schemes, it is required to write the expressions Q and M for each section in a general form, and plot the Q and M plots; find MMAX and select: a) for the scheme (a) a wooden beam of circular cross section at [σ] = 8 MPa; b) for scheme (b) a steel beam of I-section at [σ] = 160 MPa. Given: Scheme 2; ℓ1 = 1.2m; ℓ2 = 7m; a1 / a = 10; a2 / a = 8; a3 / a = 2; M = 10 kNm; P = 20 kN; q = 20 kN / m.

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