1. (50 points) Use the master method to give tight asymptotic bounds for the following recurrences. Show your reasoning step by step:
• Identify the parameters $a, b$, the driving function $f(n)$ and the watershed function $n^{\log_b a}$
• Compare $f(n)$ with the watershed function, specify which case of the theorem applies, state the chosen values of $\epsilon$ and $c$, if relevant
• Conclude with the final asymptotic bound in $\Theta$-notation
a) $T(n) = n + T(n/2)$
b) $T(n) = 1 + 2T(n/4)$