Write a Java method that takes an array of type double and returns a value of type char. The parameter array stores student's numeric grades on a scale from $0$ to $5.$ The method returns

the letter $A$ if the average value of the argument array is larger than or equal to $4$ ;

the letter $B$ if the average value of the argument array is larger than or equal to $3$ and less than $4$ ;

the letter $C$ if the average value of the argument array is larger than or equal to $2$ and less than $3$ ;

the letter $D$ if the average value of the argument array is larger than or equal to $1$ and less than $2$ ;

the letter F otherwise.

The method's header is as follows.

public static char grade$($double$[x)$

$\backslash$table$[[$Sample run,Result$],[$double $[]x=\{5,4,3\}$;$,$A$],[$char $b=$grade$(x)$;$,$C$],[\backslash$table$[[$double $[]x=\{1\mathrm{.}5,2,2,5\}$;