The international standard letter/number mapping for telephones is:{A, B, C} -> 2{D, E, F} -> 3{G, H, I} -> 4{J, K, L} -> 5{M, N, O} -> 6{P, Q, R, S} -> 7{T, U, V} -> 8{W, X, Y, Z} -> 9Write a functiongetNumber()that takes an upper case letter and returns thenumber according to the international standard above. Write a test program that prompts the user to enter a phone number as a string. The input number may contain letters. The program translates a letter (uppercaseor lowercase) to a digit and leaves all other characters intact. Here are sample runs of the program:Enter a string: 1-800- Flowers1 -800 -3569377Enter a string: 1800 flowers18003569377

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?