Safe sex i.e. condoms and dental dams. Get the HPV vaccine as well.
Tell the person stop driving, find someone else to drive or you dive yourself
Even im not giving the result, i can tell you how to do it: Since time period is given as 6, we can calculate it's:
<span><span>R(t)=0.89sin(<span>π3</span>∗1.5)
Please do the calculations and you will get your answer. Hope it helps</span></span>