The number of coefficients stored for each block of the image are as follows:

$(1,1)$: $5$ coefficients

$(1,2)$: $3$ coefficients

$(2,1)$: $10$ coefficients

$(2,2)$: $6$ coefficients

Assuming the original image is represented with $8$ bits per pixel and each coefficient is also represented with $8$ bits, the compression ratio Original:JPEG is

:$1.$ What is

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