$3\mathrm{.}15.$ The Intel $8088$ microprocessor has a read bus timing similar to that of Figure $3\mathrm{.}18,$ but require four brocessor clock cycles. The valid data is on the bus for an amount of time that extends into the fourth processor clock cycle. Assume a processor clock rate of $8MHz.$

a$.$ What is the maximum data transfer rate?

$\frac{1}{8}=126ns$

b$.$ Repeat, but assume the need to insert one wat state per byte transferred.