$2.$ Using the concept of the homogeneous function determine if the following production function exhibits increasing, decreasing or constant returns to scale:

$($i$)$ Q$=$L$+$K

$($ii$)$ Q$=$LK

$($iii$)$ Q$=10$Min$($L$,$K$)$

$($iv$)$ Q$=2$Max$($L$,$K$)$

$($v$)$ Q$=$L$^(1/2)*$K$^(1/4)$

$($vi$)$ Q $=($sqrt$($L$)+$ sqrt$($K$))^2$