I need help asap please choose all

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Which of the following is true for the relation f(x)=2x^2+1

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?