qm: 11.1a: done
qm: 11.1a: fix
qm: 11.1c: 1/2
qm: 11.1c: 2/2 done
qm: 11.1b: done
qm: 11.3a: done
qm: 11.2c,d: done
qm: 11.1b: justify solution to deq
qm: 11.1b: replace B operator
qm: 11.1b: rewrite X,P operators (unfinished)
qm: 11.1b: done
qm: 11.1b: typos
qm: 11.3bc: done
qm: 11.2b: done
qm: 11.2a: done