need help solving this graph? I think there is enough info now

Che N m LO Marginal Value Marginal Product of Average Product Average Product Product of Capital Labor Output Capital, MPK of Capital, APK of Labor, APL Capital, VMPK O O 50 200 150 100 75 400 300 150 100 600 400 100 400 450 22.5 200 475 79.2 23.75 100 475 O 67.9 23.75 O 450 -25 56.3 -22.5 -100 400 44.4 200 300 -100 15 -400 150 -150 13.6 7.5 -600 a. Identify the fixed and variable inputs