Answer
$2.95^{\circ}, 5.92^{\circ}, 8.90^{\circ}$
Work Step by Step
We can find the required angles as follows:
$\theta_1=sin^{-1}(\frac{m\lambda}{d})$
We plug in the known values to obtain:
$\theta_1=sin^{-1}[\frac{(1)(655\times 10^{-9}m)}{0.00127\times 10^{-2}m}]$
$\theta_1=2.95^{\circ}$
for $m_2$
$\theta_2=sin^{-1}[\frac{2(655\times 10^{-9}m)}{12700\times 10^{-9}m}]$
$\theta_2=5.92^{\circ}$
for $m=3$
$\theta_3=sin^{-1}[\frac{3(655\times 10^{-9}m)}{12700\times 10^{-9}m}]$
$\theta_3=8.90^{\circ}$