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Consider the function \( f(x)=\frac{x^{2}-9 x+20}{x^{2}+3 x-28} \). Can you plug \( x=4 \) into this function? Fill in the table below to look at the behavior near \( x=4 \). Enter UNDEFINED if the function is undefined. Round answers to three decimal places. Estimate the value of \( \lim _{x \rightarrow 4} f(x)= \) If the limit does not exist, write DNE. Round your answer to two decimal place.