Four rectangular panels arranged horizontally are labelled a, b, c, and d below each frame. Panel A contains a filled circular marker positioned near the centre. Panel b contains a filled square marker positioned near the centre. Panel c contains a plus sign marker formed by intersecting vertical and horizontal lines. Panel d contains a diagonal cross marker formed by intersecting diagonal lines. All markers are centrally positioned within identical rectangular boundaries.Pattern according to analysis ID: (a) Case12 to Case14; (b) Case15 to Case17; (c) Case18 to Case20; and (d) Case21 to Case23
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