A$)$ find points $A,B,C,D$ and $E(5$ pts$)$

B$)$ find position vector of $AB,AC,AD$ and EA $(4$ pts$)$

C$)$ write out the unit vector of the position vectors found for part B$)(4$ pts$)$

D$)$ If cable $AD$ has a tension of $1800$ lb $,$ determine the tension developed in cables $AB,AC$ and the antenna EA$.(17$ pts$)$

Note: if any part is incorrect, it will affect the latter portion of the problem. Total of $30$ pts