A cinder block weighing $35$ lbs located $($origin$)$ at the mid$-$sagittal plane on a ${30}^{\text{'}\text{'}}$ high production table and ${18}^{\text{'}\text{'}}$ forward to the midpoint of the worker's ankles are to be picked up and placed $($destination$)$ onto a wall $60"$ above the floor level and ${18}^{\text{'}\text{'}}$ forward to the midpoint of the worker's ankles. The average frequency of lifting is $2$ lifts $\frac{?}{\text{m}\text{i}\text{n}}$ and the task duration is one hour. The worker has to rotate his trunk by $60$ right to mid$-$sagittal plane to place the object at the destination location. The worker uses construction gloves to hold the block at its' top side edges during the lifting task.

a$.$ Evaluate the risk associated with this task.

b$.$ Find out the task redesign solutions that would provide a lifting index of $1$ and below