Which function is most appropriate to improve the given code?

Flowchart Main has $10$ float variables $($powerConsumptionApp$1,$ powerConsumptionApp$2,$ powerConsumptionApp$3,$ hoursOfUse$1,$ hoursOfUse$2,$ hoursOfUse$3,$ energyPerDay$1,$ energyPerDay$2,$ energyPerDay$3,$ totalEnergyConsumed$)$ and $15$ nodes. Node $1$ is the start node and points to node $2.$ Node $2$ code: powerConsumptionApp$1=600\mathrm{.}85$ Node $2$ points to node $3.$ Node $3$ code: hoursOfUse$1=12\mathrm{.}8$ Node $3$ points to node $4.$ Node $4$ code: energyPerDay$1=($powerConsumptionApp$1*$ hoursOfUse$1)/1000$ Node $4$ points to node $5.$ Node $5$ code: powerConsumptionApp$2=1800\mathrm{.}45$ Node $5$ points to node $6.$ Node $6$ code: hoursOfUse$2=0\mathrm{.}45$ Node $6$ points to node $7.$ Node $7$ code: energyPerDay$2=($powerConsumptionApp$2*$ hoursOfUse$2)/1000$ Node $7$ points to node $8.$ Node $8$ code: powerConsumptionApp$3=70$ Node $8$ points to node $9.$ Node $9$ code: hoursOfUse$3=1\mathrm{.}5$ Node $9$ points to node $10.$ Node $10$ code: energyPerDay$3=($powerConsumptionApp$3*$ hoursOfUse$3)/1000$ Node $10$ points to node $11.$ Node $11$ code: totalEnergyConsumed $=$ energyPerDay$1+$ energyPerDay$2+$ energyPerDay$3$ Node $11$ points to node $12.$ Node $12$ puts to output the string: The total energy consumed per day is Node $12$ points to node $13.$ Node $13$ code: Put totalEnergyConsumed to output Node $13$ points to node $14.$ Node $14$ puts to output the string: $.$

Node $14$ points to node $15.$ Node $15$ is the end node.

a$.$

Flowchart ComputeTotal has $3$ parameter variables $($float energyPerDay$1,$ float energyPerDay$2,$ float energyPerDay$3),1$ return variable $($float total$),$ and $3$ nodes. Node $1$ is the start node and points to node $2.$ Node $2$ code: total $=$ energyPerDay$1+$ energyPerDay$2+$ energyPerDay$3$ Node $2$ points to node $3.$ Node $3$ is the end node.

b$.$

Flowchart InputValues has $2$ parameter variables $($float power, float hours$),$no return variable, and $4$ nodes. Node $1$ is the start node and points to node $2.$ Node $2$ code: power $=$ Get next input Node $2$ points to node $3.$ Node $3$ code: hours $=$ Get next input Node $3$ points to node $4.$ Node $4$ is the end node.

c$.$

Flowchart ComputeEnergyConsumed has $2$ parameter variables $($float power, float hours$),1$ return variable $($float energy$),$ and $3$ nodes. Node $1$ is the start node and points to node $2.$ Node $2$ code: energy $=($power $*$ hours$)/1000$ Node $2$ points to node $3.$ Node $3$ is the end node.

d$.$

Flowchart PrintPowerConsumed has $1$ parameter variable $($float totalEnergyConsumed$),$ no return variable, and $4$ nodes. Node $1$ is the start node and points to node $2.$ Node $2$ code: Put totalEnergyConsumed to output Node $2$ points to node $3.$ Node $3$ puts to output a newline Node $3$ points to node $4.$ Node $4$ is the end node.