(e) The conversion of Fahrenheit into Celsius follows from theequation C=5/9F?160/9C=5/9F?160/9. Using mxplusbmxplusb,find the temperature in Celsius when it's 80 degreesFahrenheit.

(f) The formula for a catenary has aparameter aa:

y(x)=acosh(x/a).y(x)=acosh?(x/a).

(Here, cosh(x)cosh?(x) is the hyperbolic cosine,defined by (1/2)?(ex+e?x)(1/2)?(ex+e?x), which is implementedin JuliaJulia by coshcosh.)

Our function for this could be:

| c(x; a = 1) = a * cosh(x/a) c(x; a = 1) = a * cosh(x/a)

Using this, find the value of c(2)c(2):

(g) Find the value of c(1, a=2)c(1, a=2).