$$

Attempt $1$:$5$ attempts remaining.

Use the substitution $y=xu$ to solve the initial value problem $y^{\text{'}}=\frac{1}{2}(1(\frac{y}{x}{)}^2),y(1)=1.$

$y=$

Use the same method to solve the initial value problem $y^{\text{'}}=\frac{1}{2}(1(\frac{y}{x}{)}^2),y(1)=-9\mathrm{.}5.$

$y=$

$$