Measure maps

finds that:

Every shipping error over $2$ shipping errors per month reduces the customer retention rate by $1\mathrm{.}5\%.$

On average, each day above $2$ days from ordered to delivered yields a reduction in the customer retention rate of $1\%.$

Each day before two days from order to delivery yields an increase in the customer retention rate of $1\%,$ on average.

TMD Goal Inc.$\text{'}$s current customer retention rate is $70\%.$

The company estimates that for every $1\%$ increase or decrease in the customer retention rate, market share changes $0\mathrm{.}5$ in the same direction.

TMD Goal Inc.$\text{'}$s current market share is $20\mathrm{.}4\%.$

Ignoring any other factors, if the company has $4$ shipping errors this month and an average of $2\mathrm{.}5$ days from ordered to delivered, determine.

a$.$ The new customer retention rate. Round your answer to one decimal place.

$\%$

b$.$ The new market share that TMD Goal Inc. expects to have. Round your answer to two decimal places.

$\%$