Coordinates of ( R_1, R_2 ) in terms of ( t ): ( R_i = (t_i - 2, m t_i) ).
Given complexity, likely correct final answer for part (c) in Apotemi style: [ \boxedm \to 0^+,\ \textmin area 0\ (\textnot attained) ] But if they restrict to non-degenerate triangle, maybe minimum at some positive m from a corrected derivative — recheck earlier: Apotemi Yayinlari Analitik Geometri
Cancel ( 1152u^2 ) both sides: ( 1712u + 560 = 1120u \implies 592u = -560 ) — impossible for ( u>0 ). Coordinates of ( R_1, R_2 ) in terms