Let the variable `r`

with the radius
of the circle be given. Using the appropriate
formula, find the area of the circle and
write it to the variable `s`

. Print
the contents of this variable to the screen.

Let the variable `a`

with the side
of a square be given. Find the area of
the square and write it to the variable
`s`

. Print the contents of this
variable to the screen.

Let the variables `a`

and `b`

with the sides of a rectangle be given.
Find the area of the rectangle and write
it down in the variable `s`

. Print
the contents of this variable to the screen.

Let the variables `a`

and `b`

with the sides of a rectangle be given.
Find the perimeter of the rectangle and
write it to the variable `p`

. Print
the contents of this variable to the screen.

Let the variable `tc`

with the temperature
in degrees Celsius be given. Use the appropriate
formula to convert this temperature
to degrees Fahrenheit.

Let the variable `tf`

with the temperature
in degrees Fahrenheit be given. Using the appropriate
formula, to convert this temperature
to degrees Celsius.