Write a method called plusScores that accepts a Scanner representing an input file containing a series of lines that represent student records. Each student record takes up two lines of input. The first line has the student’s name and the second line has a series of plus and minus characters. Below is a sample input:

Kane, Erica

--+-+

Chandler, Adam

++-+

Martin, Jake

+++++++

For each student you should produce a line of output with the student’s name followed by a colon followed by the percent of plus characters. For the input above, your method should produce the following output:

Kane, Erica: 40.0% plus

Chandler, Adam: 75.0% plus

Martin, Jake: 100.0% plus