Test Average and Grade $($Methods Program$)$: Write a program that asks the user to enter $5$ test scores $($NO arrays!$).$ Your program should then display a letter grade for each test score, the average test score and the overall letter grade for the average score.

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Your program is required to have and use the following methods $($these methods CAN NOT be void methods$)$ for calculating the average score and giving the letter grade for EACH score including the average score:

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calcAverage $$ This method must accept $5$ test scores as arguments and must return the average of the $5$ scores $($NOT A VOID METHOD$).$

determineGrade $$ This method must accept a test score as an argument and must return a letter grade for the score it accepted as an argument $($NOT A VOID METHOD$).$

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Here$$s the grading scale:

Score

Letter Grade

$90-100$

A

$80-89$

B

$70-79$

C

$60-69$

D

Below $60$

F

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Conversion Program $($using Methods, $20$ pts$)$: Write a program that converts meters to kilometers, inches, or feet depending on the user$$s selection from a menu.$$

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Your program is required to have the following $4$ methods:

convertKilometers $$ This must be a method that accepts the number of meters as an argument and returns the number of kilometers $($NOT A VOID METHOD$).$ Convert meters to kilometers using the following formula:

kilometers $=$ meters $*0\mathrm{.}001$

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convertInches $-$ This must be a method that accepts the number of meters as an argument and returns the number of inches $($NOT A VOID METHOD$).$ Convert meters to inches using the following formula:

inches $=$ meters $*39\mathrm{.}37$

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convertFeet $-$ This must be a method that accepts the number of meters as an argument and returns the number of feet $($NOT A VOID METHOD$).$ Convert meters to feet using the following formula:

feet $=$ meters $*3\mathrm{.}281$

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showMenu $$ this must be a void method that accepts no arguments $($this one is void$).$ It should display the following menu:

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METER CONVERSION

$1)$ Convert to Kilometers

$2)$ Convert to Inches

$3)$ Convert to Feet

$4)$ Quit the Program

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Please make a selection:

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The program should run as follows:

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The program should start $($in the main method$)$ by calling the showMenu method to display the menu.$$ The program should then get the user$$s selection $($use int$).$

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Once the program $($main method$)$ gets the user$$s selection it should ask the user for a number of meters $($assume double$).$ Do input validation on the number of meters to prevent a negative number of meters. When valid, the number of meters the user enters will be passed as an argument into one of the methods depending on what the user$$s selection was.

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$-$If the user chose $1,$ the convertKilometers method should be called with the number of meters the user entered passed to it as an argument.$$ The number of meters converted to kilometers should be returned to the main method.

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$-$If the user chose $2,$ the convertInches method should be called with the number of meters the user entered passed to as an argument.$$ The number of meters converted to inches should be returned to the main method.

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$-$If the user chose $3,$ the convertFeet method should be called with the number of meters the user entered passed to it as an argument.$$ The number of meters converted to kilometers should be returned to the main method.

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Once the program $($main method$)$ receives the converted number of meters from the: convertKilometers, convertInches, or convertFeet method, it should display the results $($format with $3$ digits to the right of the decimal point$).$

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Example output:

$500$ meters is $\mathrm{.}500$ kilometers.

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$-$The program should continue to run until the user selects $4$ to quit the program.$$ So the user should be able to make as many conversions as they would like $($print $$invalid selection if not from $1$ to $4).$

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$-$Input validation $$ Again, do not allow the user to enter a negative number for the amount of meters.