SMD resistors come in standard sizes. You will need to figure out which size the pads are for.
https://www.google.com/search?q=smd...dDEQIHeYzDBYQ9QF6BAgFEAE#imgrc=pCqFcWI3FZFX_M
https://www.google.com/search?q=smd...dDEQIHeYzDBYQ9QF6BAgFEAE#imgrc=pCqFcWI3FZFX_M
As a quick fix to get the board working you could just clean up R45 pads (maybe also R46) with soder-wick and then solder a TH resistor as in picture. The resistance is not very critical. Anything between 30-150 ohms should work.