Upgrade DELL inspiron 15 7548 Core i5 to Core i7?

[johnyi1655]

My Laptop is as below;
Dell Inspiron 7548 A07, and Intel Core i5-5200U,
Main Circuit Board b Board: Dell Inc. 0AM6N0 A00, Bus Clock: 100 megahertz,
RAM 8 GB, Intel(R) HD Graphics 5500 [Display adapter]
PnP [Monitor] (15.7"vis).
Then I like to upgrade Core i5 to Core i7 and add a GPU.
Can I upgrade cpu, ram and /or GPU? and if possible, What kind of CORE i7 and GPU is installable?

 

[rgd1101]

Cpu not upgradeble