Creating a new variable with multiple if qualifiers

[Kim Spencer]

I am attempting to create a new variable which is only comprised of respondents who answered all specific questions correctly

There are six questions represented by the variables: knowledge_1, knowledge_2, knowledge_3, knowledge_4, knowledge_5 and knowledge_6

The correct answer for _1, _2, _4 and _5 is the value 1
The correct answer for _3 and _6 is the values 2

How would I create a variable/a group which only includes respondents who have answered all the questions correctly?

[Hemanshu Kumar]

gen byte its_all_right = (knowledge_1 == 1)*(knowledge_2 == 1)*(knowledge_4 == 1)*(knowledge_5 == 1)*(knowledge_3 == 2)*(knowledge_6 == 2)

[Kim Spencer]

Great, thank you!