Prove that for any formulae a and b and variable p, a[p : = b] is a well-formed! ) formula.

Give an example of a case where a two-way handshake to establish a connection could leave one side of the connection live while the other side does not believe there is a connection.

At an open or uncontrolled intersection, yield if a. the cross road has more lanes than yours b. the cross road has fewer land than yours c. you’re on a state highway and the cross road is a secondary road d. do you have three or more passengers in your vehicle

The “rule of 72” is used to approximate the time required for prices to double due to inflation. if the inflation rate is r%, then the rule of 72 estimates that prices will double in 72/r years. for instance, at an inflation rate of 6%, prices double in about 72/6 or 12 years. write a program to test the accuracy of this rule. for each interest rate from 1% to 20%, the program should display the rounded value of 72/r and the actual number of years required for prices to double at an r% inflation rate. (assume prices increase at the end of each year.)