Write a Python program to calculate a student's final grade. Begin by prompting the student to enter the total number of scores. Then, use a for loop to ask for each score and its weight percentage individually. After all inputs are provided, calculate and display the final grade based on the weighted scores. The following is an example of the inputs and the output:

Enter the total number of scores: $3$

Enter score $1$: $80$

Enter weight percentage for score $1$: $0\mathrm{.}30$

Enter score $2$: $90$

Enter weight percentage for score $2$: $0\mathrm{.}5$

Enter score $3$: $80$

Enter weight percentage for score $3$: $0\mathrm{.}2$

output:

The final grade is: $85$