A rigid rod of mass

Question

m3is pivoted at point A, and masses
m1 and m2 are hanging from it, as shown in the figure.

(a) What is the normal force acting on the pivot point? The ratio of the weights of
m1, m2, and m3 is 1:2:3. (Use the following as necessary: m1 and g for the acceleration due to gravity.)
N =

(b) What is the ratio of
L1 to L2,where these are the distances from the pivot point to
m1 and m2,respectively? (Use any variable or symbol stated above as necessary.)
L1/L2 =