Please reply me if anyone have the answer for my above question?
Unfortunately, you cannot change the ram size; only increase the amount. Below are the memory specs.
MemoryTable 1. Memory specificationsSlots Two SODIMM slotsType DDR4
Speed 2133 MHz
Configurations supported Per memory module slot 2 GB, 4 GB, and 8 GBTotal memory 4 GB, 6 GB, 8 GB, 12 GB, and 16 GB