Please show me how to solve with clear steps and solutions.

Find the lowest cost product of sums realisation of the foilowing incompletely speeffied funchom

$f(x_7,x_2,x_5)=M(1,7)+D(2,5)$

Select one:

G$.f(x_i$;$x_2{x}_3)=\frac{(x_{-1}{)}^{\text{'}}+(x_2{)}^{\text{'}}+x_3}{x_1+x_2+(x_3)}$

b$.\{$:$f(x_c{x}_2,x_2)=(x_2^{}+x_3))x((x_1){)}^2+(x_2)$

d$.f(x_1,x_2{x}_3)=(x_1+x_2+(x_3)u(x_2)+(x_2)+x_1)$