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3. [4 pts) The following experiments focused on the predation of M. edulis (mussel) by A. rubens (sea star), investigated over a range of mussel and sea star sizes. The profitability of all size classes of mussels for all size classes of sea stars was measured. 0.0008 0.0007 0.0006 0.0005 Profitability (g ADW/min) 0.0004 الله 0.0003 0.0002 0.0001 0 18 40 51 29 Mussel size class Figure. 1. Profitability of the different mussel size classes for three sea star size classes, where black denotes small sea stars, grey denotes medium sea stars and white denotes large sea stars. 16 14 12 mussels caten 10 . 18 40 51 29 Mussel sine class Figure 2. The average amount of eaten mussels per mussel size class depicted per sea star size class, where black denotes small sea stars, grey denotes medium sea stars and white denotes large sea stars, the error bars indicate the standard error of the observations. a) In optimal foraging theory (and in this experiment), what factors are used to estimate the profitability of a prey item? (1 pts b) Based on optimal foraging theory, predict the mussel sizes that you would expect the small, medium and large sea stars to feed on. (2 pts) c)Do the findings confirm the predictions of optimal foraging theory? Why or Why not?