Sequence is an implicit Construct of all programming languages.

is an of all .

Therefore, we can start solving problems.

2.1:
Step 1: Start.
Step 2: ADD := 0, SUB := 0, MUL := 0, DIV := 0.
Step 3: Read: NUM1, NUM2.
Step 4: ADD := NUM1 + NUM2.
Step 5: SUB := NUMI NUM2.
Step 6: MUL : NUM1 x NUM2.
Step 7: DIV := NUMI / NUM2.
Step 8: Write: ADD, SUB, MUL, DIV.
Step 9: Stop.