The exponential function $y(x)=C{e}^x$ satisfies the conditions $y(0)=7$ and $y(1)=9.$

$($a$)$ Find the constants $C$ and $.$

NOTE: Enter the exact values, or round to three decimal places.

$C=$

$=$

$($b$)$ Find $y(2).$

NOTE: Enter the exact value, or round to three decimal places.

$y(2)=$