Helping out a friend but, not knowing a thing about this good looking machine, I sourced info from the local 99 Bikes shop ( cool place, friendly & helpful staff!). Here's a link they sent that should help with specifics. Hope it can be opened or you can cut & paste??

https://www.bikeroar.com/products/merida/big-dot-nine-20-d-2016/15-red-yellow

Item is in very good shape with the tyre, rim & safety helmet inclusive in the price.