РК = 161,2+18,5Х 1 +9,3Х 2-5,33Х 3 +27,2Х 4-5,6Х 1 2-8,05Х 2 2-7,1Х 3 2 +16,35Х 4 2 + +9,6Х 1 Х 2 +7,7Х 1 Х 3 +6,1Х 1 Х 4 +6,4Х 2 Х 4-11,1Х 3 Х 4; (1) r 28 = 14,4+5,1Х 2 +5,07Х 3-3,67Х 3 +0,26Х 1 2-3,54Х 2 2-3,16Х 3 2-1,03Х 4 2-1,51Х 1 Х 2- -1,57Х 1 Х 3-1,24Х 1 Х 4 -1,19Х 2 Х 4 +3,1Х 3 Х 4.