$3.)$ In computing state plane coordinates for a project area whose mean orthometric height is $287\mathrm{.}634m,$ an average scale factor of $0\mathrm{.}99992983$ was used. The average geoidal separation for the area is $-25\mathrm{.}713m.$ The given distances between points in this project area were computed from SPCS$83$ state plane coordinates. $($Use $6,371,000$ m for an average radius for the Earth.$)$

a$.$ What is the Elevation factor?

b$.$ What is the Combined Factor?

c$.$ What horizontal length would have to be observed to lay off these lines on the ground?

i$.,2634\mathrm{.}53ft$

ii$.,229\mathrm{.}217m$

iii. $,963\mathrm{.}28ft$