3 This pseudocode algorithm inputs two non-zero numbers and a sign, and then performs the calculation shown by the sign. An input of zero for the first number terminates the process. INPUT Number1, Number2, Sign WHILE Number1 <> 0 IF Sign = '+' THEN Answer ← Number1 + Number2 ENDIF IF Sign = '-' THEN Answer ← Number1 - Number2 ENDIF IF Sign = '*' THEN Answer ← Number1 * Number2 ENDIF IF Sign = '/' THEN Answer ← Number1 / Number2 ENDIF IF Sign <> '/' AND Sign <> '*' AND Sign <> '-' AND Sign <> '+' THEN Answer ← 0 ENDIF IF Answer <> 0 THEN OUTPUT Answer ENDIF INPUT Number1, Number2, Sign ENDWHILE

1. (a)Complete the trace table for the input data: 5, 7, +, 6, 2, −, 4, 3, *, 7, 8, ?, 0, 0, / Number1 | Number2 | Sign | Answer | OUTPUT[3]
2. (b)Show how you could improve the algorithm written in pseudocode by writing an alternative type of conditional statement in pseudocode.[3]