I need help with a step by step solution please!!:

$1.$If crank AB has a constant angular velocity of $160$rpm counterclockwise, determine the angular velocity of rod BD and the velocity of collar D when:

a$)$$=0$

b$)$$=90$

$2.$The crank arm AB has a constant angular velocity of $160$rpm counterclockwise. At the instant when $=0$:

c$)$Determine the acceleration of the collar D

d$)$Determine the acceleration of the midpoint G of the rod BD