For the space truss shown, determine:

$($a$)$ The members that obviously have zero force.

$($b$)$ The member forces $P_3,P_4,$ and $P_8.$

$($c$)$ The reaction components $R_{8z}$ and $R_{5y}.$

Solve in details show each joint what reaction is on it in drawings i want the answer to be written on paper i want a clear and detailed step by step solution