A city wants to build one centrally located processing facility to serve its two counties A & B$.$ County A has a tonnage of $10,$ and its location is $(1,8)-$ County B has a tonnage of $12$ and its location is $(6,2)$ Determine the Center of Gravity of these two locations a$)(5,2,3\mathrm{.}8))(4,6,5\mathrm{.}2)$ c$)(3\mathrm{.}7,4\mathrm{.}7))(6,4,7)$