Why is LMC ever LAC in one diagram and then LMC is below the LAC in the other diagram, please explain

/ unit of output Q) E .5, \"a :1: 1: \\3 W FIGURE 11.19 The LTC, LAC and LMC Curves for a Production Process with Increasing Returns to Scale With increasing returns, the large-scale rm has lower average and marginal costs than the smaller-scale rm. Q) E 4.. \"a 3:: f: 3 Ho / unit of output FIGURE 11.18 The LTC, LAC and LMC Curves for a Production Process with Decreasing Returns to Scale Under decreasing returns, output grows less than in proportion to the growth in inputs, which means that total cost grows more than in proportion to growth in output