Using MatPlotLib plot function, is there a way to get variable size
plot symbols? For example, using symbol strings like 'o' (circle), 's'
(square), 'x' (cross), etc., is there a way to specify other plot
symbols such a small circle, Medium square, LARGE cross, etc.?

Similarly, using the MatPlotLib plot function, is there a way to get
variable hue (RGB-specified) plot colors? For example, using symbol
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