CS50 Speller Problem Set 5 (pset5) Walkthrough and Solution (Step by Step Solution for Beginners) - This Problem Set proves to be very challenging, especially ... Problem sets inspired by real-world domains of biology, cryptography, finance, forensics, and gaming. The on-campus version of CS50x, CS50, is Harvard's largest course. Students who earn a satisfactory score on 9 problem sets (i.e., programming assignments) and a final project are eligible for a certificate. (5) s10 s9 s4 s11 s6 s8 s3 (6) s10 s9 s4 s7 (7) s10 s9 s4 r3 r3 s8 r3 s3 (8) r4 r4 r4 r4 r4 r4 r4 (9) r5 r5 r5 r5 r5 r5 r5 (10) r6 r6 r6 r6 r6 r6 r6 (11) r7 r7 r7 r7 r7 r7 r7 (ii) No, upgrading this parser to LR(1) will not fix this problem. LR(1) only works on unambiguous grammars, but this grammar is ambiguous.