The jobs given in the table below have to be scheduled on a single machine according to Moore$$s method. Which of the following statements are correct?

Question $4$ Select one or more:

a$.$

Job $3$ is tardy.

b$.$

The number of tardy jobs is $2.$

c$.$

The number of tardy jobs is $1.$

d$.$

Job $1$ is tardy.

e$.$

None of these.

f$.$

Job $5$ is not tardy.