a) Estimate the numerical value of a typical walking speed (for a person) in units of mi/hr. Then, convert this value from mi/hr to m/s. (b) Next, estimate the numerical value of a typical running speed (for a person) in units of mi/hr, then convert this number to units of m/s. (c) Repeat this exercise for a typical residential driving speed. (d) Finally, consider a typical toll road or highway driving speed (not during rush hour!). Make your estimate in mi/hr and then convert to m/s.