Select the best matrix material from the table for each of the following conditions

and explain the reason and elaborate the advantages. $({10}^{},5^{}$ each$)$

$(1)$ It is applied to some high precision structure device that should withstand a

temperature of $170C.$ Choose the most economic material for the matrix.

$(2)$ It is used under a large tensile displacement and $500C$ environment.

Matrix table: