What is the defintition of a linear block code?

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ii$.$ In a block code, a dataword is $20$ bits and the corresponding codeword is $25$ bits. What are the values of $k,r,$ and $n?$ How many redundant bits are added to each dataword?

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In a codeword, we add two rodundant bits to each $8-$bit data word. Find the number of VALID CODEWORDS and INVALID CODEWORDS

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b$.$

i$.$ Given the dataword $101001111$ and the divisor $10111,$ show the generation of the CRC codeword at the sender site using binary division.

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For the question la $($i$),$ show the CRC architecture

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