In the following function, current$\_$score is the student's overrall score IF they skip the final exam $($this variable counts a $0$on the final exam$).$ Final$\_$weight represents the weight of the overall course grade that the final exam holds. Target score is the overall grade that the student is aiming for in the course. And required score is meant to return the required final exam score for a student to reach the desired overrall grade in the course. Please help fix the function so that I can return the correct required score: def required$\_$final$\_$exam$\_$score$($current$\_$score, final$\_$weight, target$\_$score$)$:

# Calculate the proportion of the final exam weight

final$\_$weight$\_$ratio $=$ final$\_$weight $/100$

# Calculate the proportion of the current score weight

current$\_$score$\_$weight $=1-$ final$\_$weight$\_$ratio

# Calculate the required score on the final exam

required$\_$score $=($target$\_$score $-$ current$\_$score $*$ current$\_$score$\_$weight$)/$ final$\_$weight$\_$ratio

return required$\_$score

# Get user input

current$\_$score $=$ float$($input$("$Enter the current overall score if you skipped the final exam $($got a $0$ on the final$)$: $"))$

final$\_$weight $=$ float$($input$("$Enter the final exam weight $($in percentage$)$: $"))$

target$\_$score $=$ float$($input$("$Enter the target overall course grade: $"))$

# Calculate the required final exam score

required$\_$score $=$ required$\_$final$\_$exam$\_$score$($current$\_$score, final$\_$weight, target$\_$score$)$

# Display the required score

print$("$Required Final Exam Score:", required$\_$score$)$

SAMPLE Test case

$--------------$

Enter the current score: $72\mathrm{.}5$

Enter the final exam weight $($in percentage$)$: $20$

Enter the target overall course grade: $90$

Required Final Exam Score: $160\mathrm{.}0$

Process finished with exit code $0$

# The required exam score$4$ is obviously incorrect, please help me fix the function and run this test case to verify the fixed function works please.