a) Implement the following equation x4 sin(45x) + x3 cos(25 x) + x2 tan(30 x) + 12x-1 + cos(108 x2 ) Where value of x will be 5. Make a program to find the diameter d=2r and area of the sphere. Value of r should be defined by the user

Q2 Create a program that calculates your daily driving cost, so that you can estimate how much money could be saved by carpooling (car-sharing), which also has other advantages such as reducing carbon emissions and reducing traffic congestion. The program should input the following information and display the users cost per day of driving to work: a) Total miles driven per day. b) Cost per gallon of gasoline. c) Average miles per gallon. d) Parking fees per day.

want solution in c language