Please help I need the answer now

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

Given: △abc, bc> ac, d∈ ac , cd=cb prove: m∠abd is acute

Parallelogram abcd has vertices a(8, 2), b(6, –4), and c(–5, –4). find the coordinates of d. !