The CIO of an IT company would like to investigate how a software developers work experience (in number of years), professional certifications (number of certificates), and knowledge of various computer languages (number of programming languages) contribute to his/her work performance. The work performance is measured on the scale of 1 to 1000 so that the higher ones score, the better his/her work performance. He collects data from 20 software developers in his company which is provided in the table below.

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Employee ID Years of experience Num of certificates Num of progLang Performance 1 27 3 8 880 2 11 1 2 686 3 6 2 1 681 4 21 3 4 877 5 26 3 4 975 6 21 3 4 902 7 18 3 3 900 8 15 2 5 882 9 14 2 3 775 10 5 1 3 650 11 17 2 5 908 12 14 2 4 687 13 15 3 4 891 14 7 2 3 566 15 5 3 1 959 16 13 2 5 793 17 11 2 4 778 18 31 3 7 975 19 16 2 5 846 20 12 3 6 779 What is the R-square value of this regression model?

Group of answer choices

8.96%

64.7%

79.2%

45.4%

62.7%