Answer from cs61c-cj (Peter Lau 16539384) for Question 1
Although the TLB is smaller than the L1 cache, the TLB references pages while the L1 cache holds blocks.  Pages are larger than cache blocks so for the duration of a working set, we are more likely to stay within a page than a cache block.  We would probably access many different blocks which will lead to more misses than the TLB which references pages.