You are given a C program "q2.c" as below. This program is used to calculate the average word length for a sentence (a string in a single line) Enter a sentence: It was deja vu all over again Average word length: 3.4 For simplicity, the program considers a punctuation mark to be part of the word to which it is attached. And it displays the average word length to one decimal place include

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.