Part $4$

b$.$ After some$$ study, the operations manager Darren Funk recommends $3$ options to improve the$$ company's multifactor$$ productivity:

Option $1$: increase the sales price by $15$ percent

Option $2$: improve quality so that only $15$ percent are$$ defective, or

Option $3$: reduce$$ labor, materials, and overhead costs by $15$ percent.

Part $5$

If$$ Mack's guitar fabrication shop decides to implement Darren$$ Funk's option $1$ to improve the multifactor$$ productivity, the new productivity level would be