Question

Four penalty scores are added for each of the eight possible masks of these things to determine the best mask pattern to use. Modules in these things are grouped into patterns like the “finder patterns” and “timing patterns”. An alternative to these things partially named “Aztec” doesn’t require a “quiet zone”. These things are classified into the levels L, M, Q, or H depending on the proportion of error correction bytes in their (*) Reed-Solomon blocks. These things are used alongside the (-5[1])Alipay (“ALLEY-pay”) app for payment, and in general, almost all payments (10[2])in China today involve (-5[1])these things. The forty “versions” of these things correspond to their allowable sizes, starting at 21 by 21. Squares are prominently displayed in three of the four (10[1])corners of, for 10 points, what ubiquitous two-dimensional barcodes? ■END■ (10[1])

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