Formatting your output

a is a constant that is given to you in learner template.

Let's represent it in three ways:

First, output this constant to only show $4$ digits after the decimal point and assign the result into variable b$.$

Next, output this constant to show $15$ digits after the decimal point and assign the result into variable c$.$

Finally, output this constant to show $15$ digits after the decimal point with scientific notation and assign the result into variable d$.$

Don't change the first $2$ lines in learner template.