Fundamental Problems in Structural Analysis: Determine the reactions at the supports for the structures

shown below $($Problems $1$ to $3).$

Problem $1-$ Cantilever beam with fixed support at $A.$

Problem $2-$ Simple beam with pin support at A and roller support at $B.$

Problem $3-$ A beam with roller support at A and fixed support at B$.$ A pin or hinge is present $30-$ft from

A$.$

Hint: Problem $3$ can be solved by creating a FBD for the structure from A$-$B $($i$.$e$.,$ without taking the

compound beam apart at the hinge location$)-$ and use equation of condition at the hinge strategically.