Finished tutorial 2a
Finished tutorial 2a


Former-commit-id: bcecb1c0107ac3e184806da77b07c8f18803a33d [formerly 2917a2f0f67a20a5372ef2f05e0cf69635b35f80]
Former-commit-id: 49112a53c9d304703bf76100c15a15c31fa0e66d
justinbois/bebi103_utils