Question $5$

Ibrahim electronics company has developed a new product for the video conferencing market. The product has successfully completed its testing phase and Ibrahim has now produced the first four production units. The first unit took three hours of labour time and the total time for the first four units was $8\mathrm{.}3667$ hours.

Required:

a$)$ Calculate the learning curve improvement rate $($rate of learning$)$ to the nearest $0\mathrm{.}1$ per cent.