For #1 it's going to be proper because it's pretty specific, and for number two it's going to be all common because it's not citing anything specific.
Answer:

Step-by-step explanation:
The composite solid consists of a cylinder and a cone. Therefore, its total volume will be the sum of the volumes of the cylinder and cone:
Volume of the cone: 
Volume of the cylinder: 
Thus, the total volume of the solid is:

Answer:
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Step-by-step explanation:
An algebraic expression consists of one or more numbers and variables, for 1/8y it will be y+1/8