A given program runs in $10$sec on computer A$,$ which has a $100$ MHz clock. We are trying to help a computer designer build a computer B$,$ that will run this program in $6$ sec$.$ The designer has determined that a substantial increase in the clock rate is possible, but this increase will affect the rest of the CPU design, causing computer B to require $1\mathrm{.}2$ times as many clock cycles as computer A for this program. What clock rate should we tell the designer to target $.$