Register $R_{1}$ and $R_{2}$ of a computer contain the decimal values $1200$ and $4600$ . What is the effective address of the memory operand in each of the following instructions?
$\left ( a \right )$ $Load$ $20\left ( R_{1} \right ),R_{5}$ Ans-
/
/Displacement. 1220
$\left ( b\right )$ $Move$ #$3000,R_{5}$ Ans-?
//Immidiate
$\left ( c \right )$ $Store$ $R_{5},30\left ( R_{1},R_{2} \right )$ Ans-5830
//Indexed
$\left ( d \right )$ $Add$ $-\left ( R_{2} \right ),R_{5}$ Ans-4599
//Auto Decrement
$\left ( e \right )$ $Subtract$ $\left ( R_{1} \right )+,R_{5}$ Ans-1200
//Autoincrement