Which of the following statements regarding IRA $($Individual Retirenment Account$)$ is true?O $1.$All taxpayers with high income are not allowed to contribute to traditional IRAs.O$2.$ Contributions to Roth IRAs are not deductibleO$3.$ Regarding Roth IRA, taxpayers are required to start taking required minimum distributions when the taxpayer reaches age $72$O$4,$ If marginal tax rate is expected to increase over time, traditional IRA is beneficialO$5.$All of the above are false.