<human>: Question: How old was Bell when his mom started to go deaf?

Is Bell was also deeply affected by his mother's gradual deafness, (she began to lose her hearing when he was 12) and learned a manual finger language so he could sit at her side and tap out silently the conversations swirling around the family parlour. a good answer to this question?

OPTIONS:
- yes
- no
<bot>: yes