Chinese Hamster Ovarian cells $(CHO)$ are being evaluated for use in recombinant protein production. The following data is

recorded from the process development $5L$ scale reactor.

Table $2$: CHO cell bioreactor data for recombinant protein

a$)$ Does the culture exhibit exponential growth? $-$ present the graph used to determine this

b$)$ Determine ${}_{\text{m}\text{a}\text{x}}$

c$)$ Is there a lag phase? If so$,$ how long is this phase?

d$)$ Assess the doubling time for this species.

e$)$ What is the observed yield of biomass to substrate yield $($Y$\text{'})$