Exercise $13\mathrm{.}7\mathrm{.}1$: A patient record consists of the following fixed$-$length fields: the patient$$s date of birth, social$-$security number, and patient ID$,$ each $10$ bytes long. It also has the following variable$-$length fields: name, address, and patient history. If pointers within a record require $4$ bytes, and the record length is a $4-$byte integer, how many bytes, exclusive of the space needed for the variable length fields, are needed for the record? You may assume that no alignment of fields is required