Given:

$E(R_1)=0\mathrm{.}12$

$E(R_2)=0\mathrm{.}16$

${}_1=0\mathrm{.}04$

${}_2=0\mathrm{.}06$

Plot the results on a return$-$risk graph. Without calculations, draw in what a curve with varying

weights would look like if the correlation coefficient had been $0\mathrm{.}00,$ or if it had been $-0\mathrm{.}70.$