A $2\mathrm{.}00kg$ block $($mass $1)$ and a $4\mathrm{.}00kg$ block $($mass $2)$ are connected by a light string as shown; the inclination of the ramp is $35.$ Friction is negligible.

What is

$($a$)$ the acceleration of the blocks and

$($b$)($b$)$ the tension in the string?