1. Write a python program that asks a user to enter the value

for three resistors R1, R2 and R3. Include one or more

functions that:

a. Validates the data by ensuring a positive numeric value

was entered. If the entered number is negative or zero, a

message should display that this is not a valid resistance.

Please enter a positive number.

b. Calculates the total resistance when R1 & R2 & R3 are

in series configuration. Then display a message: "if R1,

R2 and R3 are in series, then the total resistance

is

_". Refer to the figure below. You can use the

following equation.

c. Calculate the total resistance when R1 & R2 & R3 are in

a parallel configuration. And display a message that "if

R1, R2 and R3 are in parallel, then the total resistance

is _". Refer to the diagram below. You can use the

equation.

R1

R2

R1

R2

d. Calculate the total resistance when RI & R2 are in

parallel, and the result is in series with R3. And display a

message that "if R1, R2 are in parallel and the result to

be in series with R3, then total resistance is

Refer to the figure below. You can use the equation:

R3

R3